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/* network.h
*
* Datatypes, functions and includes for the core networking.
*
Copyright (C) 2013 Tox project All Rights Reserved.
This file is part of Tox.
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/>.
*/
#ifndef NETWORK_H
#define NETWORK_H
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <time.h>
#ifdef WIN32 /* Put win32 includes here */
#include <winsock2.h>
#include <windows.h>
#include <wspiapi.h>
#undef VANILLA_NACL /* make sure on windows we use libsodium */
#else //Linux includes
#include <fcntl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <errno.h>
#include <sys/time.h>
#include <sys/types.h>
#include <netdb.h>
#endif
#ifndef VANILLA_NACL
/* we use libsodium by default */
#include <sodium.h>
#else
/* TODO: Including stuff like this is bad. This needs fixing.
We keep support for the original NaCl for now. */
#include "../nacl/build/Linux/include/amd64/crypto_box.h"
#endif
#define MAX_UDP_PACKET_SIZE 65507
typedef union
{
uint8_t c[4];
uint16_t s[2];
uint32_t i;
}IP;
typedef struct
{
IP ip;
uint16_t port;
/* not used for anything right now */
uint16_t padding;
}IP_Port;
typedef struct
{
int16_t family;
uint16_t port;
IP ip;
uint8_t zeroes[8];
#ifdef ENABLE_IPV6
uint8_t zeroes2[12];
#endif
}ADDR;
/* returns current time in milleseconds since the epoch. */
uint64_t current_time();
/* return a random number
NOTE: this function should probably not be used where cryptographic randomness is absolutely necessary */
uint32_t random_int();
/* Basic network functions: */
/* Function to send packet(data) of length length to ip_port */
int sendpacket(IP_Port ip_port, uint8_t * data, uint32_t length);
/* Function to receive data, ip and port of sender is put into ip_port
the packet data into data
the packet length into length. */
int receivepacket(IP_Port * ip_port, uint8_t * data, uint32_t * length);
/* initialize networking
bind to ip and port
ip must be in network order EX: 127.0.0.1 = (7F000001)
port is in host byte order (this means don't worry about it)
returns 0 if no problems
TODO: add something to check if there are errors */
int init_networking(IP ip ,uint16_t port);
/* function to cleanup networking stuff(doesn't do much right now) */
void shutdown_networking();
/* resolves provided address to a binary data in network byte order
address is ASCII null terminated string
address should represent IPv4, IPv6 or a hostname
on success returns a data in network byte order that can be used to set IP.i or IP_Port.ip.i
on failure returns -1 */
int resolve_addr(char *address);
#endif
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