/*
 * Copyright (C) 2025 The pgagroal community
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list
 * of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this
 * list of conditions and the following disclaimer in the documentation and/or other
 * materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may
 * be used to endorse or promote products derived from this software without specific
 * prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef PGAGROAL_NETWORK_H
#define PGAGROAL_NETWORK_H

#ifdef __cplusplus
extern "C" {
#endif

#include <stdbool.h>
#include <stdlib.h>
#include <sys/socket.h>

/**
 * Bind sockets for a host
 * @param hostname The host name
 * @param port The port number
 * @param fds The resulting descriptors
 * @param length The resulting length of descriptors
 * @param no_delay Use NODELAY
 * @param backlog the number of backlogs
 * @return 0 upon success, otherwise 1
 */
int
pgagroal_bind(const char* hostname, int port, int** fds, int* length, bool no_delay, int backlog);

/**
 * Bind a Unix Domain Socket
 * @param directory The directory
 * @param file The file
 * @param fd The resulting descriptor
 * @return 0 upon success, otherwise 1
 */
int
pgagroal_bind_unix_socket(const char* directory, const char* file, int* fd);

/**
 * Remove Unix Domain Socket directory
 * @param directory The directory
 * @param file The file
 * @return 0 upon success, otherwise 1
 */
int
pgagroal_remove_unix_socket(const char* directory, const char* file);

/**
 * Connect to a host
 * @param hostname The host name
 * @param port The port number
 * @param fd The resulting descriptor
 * @param keep_alive Use keep alive
 * @param no_delay Use NODELAY
 * @return 0 upon success, otherwise 1
 */
int
pgagroal_connect(const char* hostname, int port, int* fd, bool keep_alive, bool no_delay);

/**
 * Connect to a Unix Domain Socket
 * @param directory The directory
 * @param file The file
 * @param fd The resulting descriptor
 * @return 0 upon success, otherwise 1
 */
int
pgagroal_connect_unix_socket(const char* directory, const char* file, int* fd);

/**
 * Is the socket valid
 * @param fd The descriptor
 * @return True upon success, otherwise false
 */
bool
pgagroal_socket_isvalid(int fd);

/**
 * Disconnect from a descriptor
 * @param fd The descriptor
 * @return 0 upon success, otherwise 1
 */
int
pgagroal_disconnect(int fd);

/**
 * Get the sockaddr_in structure
 * @param sa The sockaddr structure
 * @return The sockaddr_in / sockaddr_in6 structure
 */
void*
pgagroal_get_sockaddr(struct sockaddr* sa);

/**
 * Get the address of a sockaddr
 * @param sa The sockaddr structure
 * @param address The result address
 * @param length The length
 */
void
pgagroal_get_address(struct sockaddr* sa, char* address, size_t length);

/**
 * Apply TCP/NODELAY to a descriptor
 * @param fd The descriptor
 * @return 0 upon success, otherwise 1
 */
int
pgagroal_tcp_nodelay(int fd);

/**
 * Does the socket have an error associated
 * @param fd The descriptor
 * @return 0 upon success, otherwise 1
 */
int
pgagroal_socket_has_error(int fd);

/**
 * Read bytes from a socket to buffer
 * @param ssl The ssl
 * @param fd The descriptor
 * @param buffer The buffer to write to
 * @param buffer_size Size of buffer
 * @return The number of bytes read
 */
int
pgagroal_read_socket(SSL* ssl, int fd, char* buffer, size_t buffer_size);

/**
 * Write bytes from a buffer to socket
 * @param ssl The ssl
 * @param fd The descriptor
 * @param buffer The buffer to write to
 * @param buffer_size Size of buffer
 * @return The number of bytes written
 */
int
pgagroal_write_socket(SSL* ssl, int fd, char* buffer, size_t buffer_size);

#ifdef __cplusplus
}
#endif

#endif
