// Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) All rights reserved.
// SPDX-License-Identifier: Apache-2.0

#ifndef OPENSSL_HEADER_BIO_INTERNAL_H
#define OPENSSL_HEADER_BIO_INTERNAL_H

#include <openssl/bio.h>

#if !defined(OPENSSL_NO_SOCK)
#if !defined(OPENSSL_WINDOWS)
#if defined(OPENSSL_PNACL)
// newlib uses u_short in socket.h without defining it.
typedef unsigned short u_short;
#endif
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/un.h>
#include <unistd.h>
#else
OPENSSL_MSVC_PRAGMA(warning(push, 3))
#include <winsock2.h>
#include <ws2ipdef.h>
OPENSSL_MSVC_PRAGMA(warning(pop))
typedef int socklen_t;
#if !defined(_SSIZE_T_DEFINED)
typedef SSIZE_T ssize_t;
#endif
#endif
#endif  // !OPENSSL_NO_SOCK

#if defined(__cplusplus)
extern "C" {
#endif


#if !defined(OPENSSL_NO_SOCK)

// bio_ip_and_port_to_socket_and_addr creates a socket and fills in |*out_addr|
// and |*out_addr_length| with the correct values for connecting to |hostname|
// on |port_str|. It returns one on success or zero on error.
int bio_ip_and_port_to_socket_and_addr(int *out_sock,
                                       struct sockaddr_storage *out_addr,
                                       socklen_t *out_addr_length,
                                       const char *hostname,
                                       const char *port_str);

// bio_socket_nbio sets whether |sock| is non-blocking. It returns one on
// success and zero otherwise.
int bio_socket_nbio(int sock, int on);

// bio_clear_socket_error clears the last socket error on |sock|.
void bio_clear_socket_error(int sock);

// bio_sock_error_get_and_clear clears and returns the last socket error on |sock|.
int bio_sock_error_get_and_clear(int sock);

// bio_socket_should_retry returns non-zero if |return_value| indicates an error
// and the last socket error indicates that it's non-fatal.
int bio_socket_should_retry(int return_value);

#if defined(AF_UNIX) && !defined(OPENSSL_WINDOWS) && !defined(OPENSSL_ANDROID)
  // Winsock2 APIs don't support AF_UNIX.
  // > The values currently supported are AF_INET or AF_INET6, which are the
  // > Internet address family formats for IPv4 and IPv6.
  // https://learn.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-socket
#define AWS_LC_HAS_AF_UNIX 1
#endif

union bio_addr_st {
    struct sockaddr sa;
#ifdef AF_INET6
    struct sockaddr_in6 s_in6;
#endif
    struct sockaddr_in s_in;
#if AWS_LC_HAS_AF_UNIX
    struct sockaddr_un s_un;
#endif
};

#endif  // !OPENSSL_NO_SOCK

// bio_errno_should_retry returns non-zero if |return_value| indicates an error
// and |errno| indicates that it's non-fatal.
int bio_errno_should_retry(int return_value);

#if defined(__cplusplus)
}  // extern C
#endif

#endif  // OPENSSL_HEADER_BIO_INTERNAL_H