/*
 * Usurpation – network logic
 *
 * Copyright (C) 2019 Gediminas Jakutis
 * Copyright (C) 2019 Paulius Ratkevičius
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; version 2.1
 * of the License.
 *
 * This program 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#ifndef USURPATION_NET_H_INCLUDED
#define USURPATION_NET_H_INCLUDED

#include <sys/socket.h>
#include <netinet/in.h>

#include <stddef.h>

/**
 * Initialises a listening socket and returns the associated network descriptor.
 */
int net_init(const unsigned short int port);

/**
 * Closes connection associated with network descriptor.
 */
int net_close(int nd);

/**
 * Get last data received from connection associated with network descriptor.
 * If the pointer pointed by data is NULL, a buffer is allocated by the function
 * and needs to be free()'d later. Otherwise, the supplied buffer is reused.
 * Returns the amount of data acually fetched through recvsize pointer.
 */
int net_getlastdata(int nd, char ** const data, size_t *recvsize);
int net_send(int nd, const char * const buf, size_t buf_size);

int net_send_addr(int nd, const char * const buf, size_t buf_size, const struct sockaddr_in * const addr);
void net_flush_read_buffer(int nd);

#endif /* USURPATION_NET_H_INCLUDED */