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135 lines
3.9 KiB
C
135 lines
3.9 KiB
C
/*
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* onion_client.h -- Implementation of the client part of docs/Prevent_Tracking.txt
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* (The part that uses the onion stuff to connect to the friend)
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*
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* Copyright (C) 2013 Tox project All Rights Reserved.
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*
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* This file is part of Tox.
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*
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* Tox is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Tox is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Tox. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef ONION_CLIENT_H
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#define ONION_CLIENT_H
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#include "onion_announce.h"
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#define MAX_ONION_CLIENTS 8
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#define ONION_NODE_TIMEOUT 200
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/* The interval in seconds at which to tell our friends where we are */
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#define ONION_FAKEID_INTERVAL 60
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typedef struct {
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uint8_t client_id[CLIENT_ID_SIZE];
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IP_Port ip_port;
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uint8_t ping_id[ONION_PING_ID_SIZE];
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uint64_t timestamp;
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uint64_t last_pinged;
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} Onion_Node;
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typedef struct {
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uint8_t status; /* 0 if friend is not valid, 1 if friend is valid.*/
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uint8_t fake_client_id[crypto_box_PUBLICKEYBYTES];
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uint8_t real_client_id[crypto_box_PUBLICKEYBYTES];
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Onion_Node clients_list[MAX_ONION_CLIENTS];
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uint8_t temp_public_key[crypto_box_PUBLICKEYBYTES];
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uint8_t temp_secret_key[crypto_box_SECRETKEYBYTES];
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uint64_t last_fakeid_sent;
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} Onion_Friend;
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typedef int (*oniondata_handler_callback)(void *object, uint8_t *source_pubkey, uint8_t *data, uint32_t len);
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typedef struct {
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DHT *dht;
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Networking_Core *net;
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Onion_Friend *friends_list;
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uint16_t num_friends;
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Onion_Node clients_announce_list[MAX_ONION_CLIENTS];
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uint8_t secret_symmetric_key[crypto_secretbox_KEYBYTES];
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uint64_t last_run;
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struct {
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oniondata_handler_callback function;
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void *object;
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} Onion_Data_Handlers[256];
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} Onion_Client;
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/* Add a friend who we want to connect to.
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*
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* return -1 on failure.
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* return the friend number on success or if the friend was already added.
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*/
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int onion_friend_num(Onion_Client *onion_c, uint8_t *client_id);
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/* Add a friend who we want to connect to.
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*
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* return -1 on failure.
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* return the friend number on success.
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*/
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int onion_addfriend(Onion_Client *onion_c, uint8_t *client_id);
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/* Delete a friend.
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*
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* return -1 on failure.
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* return the deleted friend number on success.
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*/
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int onion_delfriend(Onion_Client *onion_c, int friend_num);
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/* Get the ip of friend friendnum and put it in ip_port
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*
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* return -1 on failure
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* return 0 on success
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*
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*/
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int onion_getfriendip(Onion_Client *onion_c, int friend_num, IP_Port *ip_port);
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/* Takes 3 random nodes that we know and puts them in nodes
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*
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* nodes must be longer than 3.
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*
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* return -1 on failure
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* return 0 on success
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*
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*/
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int random_path(Onion_Client *onion_c, Node_format *nodes);
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/* Send data of length length to friendnum.
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* This data will be recieved by the friend using the Onion_Data_Handlers callbacks.
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*
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* Even if this function succeeds, the friend might not recieve any data.
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*
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* return the number of packets sent on success
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* return -1 on failure.
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*/
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int send_onion_data(Onion_Client *onion_c, int friend_num, uint8_t *data, uint32_t length);
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/* Function to call when onion data packet with contents beginning with byte is received. */
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void oniondata_registerhandler(Onion_Client *onion_c, uint8_t byte, oniondata_handler_callback cb, void *object);
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void do_onion_client(Onion_Client *onion_c);
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Onion_Client *new_onion_client(DHT *dht);
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void kill_onion_client(Onion_Client *onion_c);
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#endif
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