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67 lines
2.2 KiB
C
67 lines
2.2 KiB
C
/*
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* onion.h -- Implementation of the onion part of docs/Prevent_Tracking.txt
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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_H
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#define ONION_H
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#include "DHT.h"
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typedef struct {
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DHT *dht;
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Networking_Core *net;
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uint8_t secret_symmetric_key[crypto_secretbox_KEYBYTES];
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} Onion;
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#define ONION_RETURN_1 (crypto_secretbox_NONCEBYTES + sizeof(IP_Port) + crypto_secretbox_MACBYTES)
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#define ONION_RETURN_2 (crypto_secretbox_NONCEBYTES + sizeof(IP_Port) + crypto_secretbox_MACBYTES + ONION_RETURN_1)
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#define ONION_RETURN_3 (crypto_secretbox_NONCEBYTES + sizeof(IP_Port) + crypto_secretbox_MACBYTES + ONION_RETURN_2)
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#define ONION_SEND_BASE (crypto_box_PUBLICKEYBYTES + sizeof(IP_Port) + crypto_box_MACBYTES)
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#define ONION_SEND_3 (crypto_box_NONCEBYTES + ONION_SEND_BASE + ONION_RETURN_2)
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#define ONION_SEND_2 (crypto_box_NONCEBYTES + ONION_SEND_BASE*2 + ONION_RETURN_1)
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#define ONION_SEND_1 (crypto_box_NONCEBYTES + ONION_SEND_BASE*3)
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/* Create and send a onion packet.
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*
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* nodes is a list of 4 nodes, the packet will route through nodes 0, 1, 2 and the data
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* with length length will arrive at 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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int send_onion_packet(DHT *dht, Node_format *nodes, uint8_t *data, uint32_t length);
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/* Create and send a onion response sent initially to dest with.
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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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int send_onion_response(Networking_Core *net, IP_Port dest, uint8_t *data, uint32_t length, uint8_t *ret);
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Onion *new_onion(DHT *dht);
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void kill_onion(Onion *onion);
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#endif
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