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94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
/* DHT.h
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*
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* An implementation of the DHT as seen in docs/DHT.txt
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*
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Copyright (C) 2013 Tox project All Rights Reserved.
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This file is part of Tox.
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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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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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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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#ifndef DHT_H
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#define DHT_H
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#include "net_crypto.h"
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//Current time, unix format
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#define unix_time() ((uint32_t)time(NULL))
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//size of the client_id in bytes
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#define CLIENT_ID_SIZE crypto_box_PUBLICKEYBYTES
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//Add a new friend to the friends list
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//client_id must be CLIENT_ID_SIZE bytes long.
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//returns 0 if success
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//returns 1 if failure (friends list is full)
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int DHT_addfriend(uint8_t * client_id);
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//Delete a friend from the friends list
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//client_id must be CLIENT_ID_SIZE bytes long.
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//returns 0 if success
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//returns 1 if failure (client_id not in friends list)
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int DHT_delfriend(uint8_t * client_id);
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//Get ip of friend
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//client_id must be CLIENT_ID_SIZE bytes long.
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//ip must be 4 bytes long.
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//port must be 2 bytes long.
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//returns ip if success
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//returns ip of 0 if failure (This means the friend is either offline or we have not found him yet.)
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//returns ip of 1 if friend is not in list.
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IP_Port DHT_getfriendip(uint8_t * client_id);
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//Run this function at least a couple times per second (It's the main loop)
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void doDHT();
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//if we receive a DHT packet we call this function so it can be handled.
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//Return 0 if packet is handled correctly.
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//return 1 if it didn't handle the packet or if the packet was shit.
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int DHT_handlepacket(uint8_t * packet, uint32_t length, IP_Port source);
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//Use this function to bootstrap the client
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//Sends a get nodes request to the given node with ip port and public_key
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void DHT_bootstrap(IP_Port ip_port, uint8_t * public_key);
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//SAVE/LOAD functions
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//get the size of the DHT (for saving)
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uint32_t DHT_size();
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//save the DHT in data where data is an array of size DHT_size()
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void DHT_save(uint8_t * data);
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//load the DHT from data of size size;
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//return -1 if failure
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//return 0 if success
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int DHT_load(uint8_t * data, uint32_t size);
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//returns 0 if we are not connected to the DHT
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//returns 1 if we are
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int DHT_isconnected();
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#endif
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