/* Provide a sys/socket header file for systems lacking it (read: MinGW)
   and for systems where it is incomplete.
   Copyright (C) 2005-2009 Free Software Foundation, Inc.
   Written by Simon Josefsson.

   This program 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, or (at your option)
   any later version.

   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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */

/* This file is supposed to be used on platforms that lack <sys/socket.h>,
   on platforms where <sys/socket.h> cannot be included standalone, and on
   platforms where <sys/socket.h> does not provide all necessary definitions.
   It is intended to provide definitions and prototypes needed by an
   application.  */

#ifndef _GL_SYS_SOCKET_H

#if @HAVE_SYS_SOCKET_H@

# if __GNUC__ >= 3
@PRAGMA_SYSTEM_HEADER@
# endif

/* On many platforms, <sys/socket.h> assumes prior inclusion of
   <sys/types.h>.  */
# include <sys/types.h>

/* The include_next requires a split double-inclusion guard.  */
# @INCLUDE_NEXT@ @NEXT_SYS_SOCKET_H@

#endif

#ifndef _GL_SYS_SOCKET_H
#define _GL_SYS_SOCKET_H

#if !@HAVE_STRUCT_SOCKADDR_STORAGE@
# include <alignof.h>
/* Code taken from glibc sysdeps/unix/sysv/linux/bits/socket.h on
   2009-05-08, licensed under LGPLv2.1+, plus portability fixes. */
# define __ss_aligntype unsigned long int
# define _SS_SIZE 256
# define _SS_PADSIZE \
    (_SS_SIZE - ((sizeof (sa_family_t) >= alignof (__ss_aligntype)	\
		  ? sizeof (sa_family_t)				\
		  : alignof (__ss_aligntype))				\
		 + sizeof (__ss_aligntype)))

struct sockaddr_storage
{
  sa_family_t ss_family;      /* Address family, etc.  */
  __ss_aligntype __ss_align;  /* Force desired alignment.  */
  char __ss_padding[_SS_PADSIZE];
};
#endif

#if @HAVE_SYS_SOCKET_H@

/* A platform that has <sys/socket.h>.  */

/* For shutdown().  */
# if !defined SHUT_RD
#  define SHUT_RD 0
# endif
# if !defined SHUT_WR
#  define SHUT_WR 1
# endif
# if !defined SHUT_RDWR
#  define SHUT_RDWR 2
# endif

#else

# ifdef __CYGWIN__
#  error "Cygwin does have a sys/socket.h, doesn't it?!?"
# endif

/* A platform that lacks <sys/socket.h>.

   Currently only MinGW is supported.  See the gnulib manual regarding
   Windows sockets.  MinGW has the header files winsock2.h and
   ws2tcpip.h that declare the sys/socket.h definitions we need.  Note
   that you can influence which definitions you get by setting the
   WINVER symbol before including these two files.  For example,
   getaddrinfo is only available if _WIN32_WINNT >= 0x0501 (that
   symbol is set indiriectly through WINVER).  You can set this by
   adding AC_DEFINE(WINVER, 0x0501) to configure.ac.  Note that your
   code may not run on older Windows releases then.  My Windows 2000
   box was not able to run the code, for example.  The situation is
   slightly confusing because:
   http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winsock/winsock/getaddrinfo_2.asp
   suggests that getaddrinfo should be available on all Windows
   releases. */


# if @HAVE_WINSOCK2_H@
#  include <winsock2.h>
# endif
# if @HAVE_WS2TCPIP_H@
#  include <ws2tcpip.h>
# endif

/* For shutdown(). */
# if !defined SHUT_RD && defined SD_RECEIVE
#  define SHUT_RD SD_RECEIVE
# endif
# if !defined SHUT_WR && defined SD_SEND
#  define SHUT_WR SD_SEND
# endif
# if !defined SHUT_RDWR && defined SD_BOTH
#  define SHUT_RDWR SD_BOTH
# endif

/* The definition of GL_LINK_WARNING is copied here.  */

# if @HAVE_WINSOCK2_H@
/* Include headers needed by the emulation code.  */
#  include <sys/types.h>
#  include <io.h>

typedef int socklen_t;

# endif

# ifdef __cplusplus
extern "C" {
# endif

# if @HAVE_WINSOCK2_H@

/* Re-define FD_ISSET to avoid a WSA call while we are not using
   network sockets.  */
static inline int
rpl_fd_isset (SOCKET fd, fd_set * set)
{
  u_int i;
  if (set == NULL)
    return 0;

  for (i = 0; i < set->fd_count; i++)
    if (set->fd_array[i] == fd)
      return 1;

  return 0;
}

#  undef FD_ISSET
#  define FD_ISSET(fd, set) rpl_fd_isset(fd, set)

# endif

/* Wrap everything else to use libc file descriptors for sockets.  */

# if @HAVE_WINSOCK2_H@ && !defined _GL_UNISTD_H
#  undef close
#  define close close_used_without_including_unistd_h
# endif

# if @HAVE_WINSOCK2_H@ && !defined _GL_UNISTD_H
#  undef gethostname
#  define gethostname gethostname_used_without_including_unistd_h
# endif

# if @GNULIB_SOCKET@
#  if @HAVE_WINSOCK2_H@
#   undef socket
#   define socket		rpl_socket
extern int rpl_socket (int, int, int protocol);
#  endif
# elif @HAVE_WINSOCK2_H@
#  undef socket
#  define socket socket_used_without_requesting_gnulib_module_socket
# elif defined GNULIB_POSIXCHECK
#  undef socket
#  define socket(d,t,p) \
     (GL_LINK_WARNING ("socket is not always POSIX compliant - " \
                       "use gnulib module socket for portability"), \
      socket (d, t, p))
# endif

# if @GNULIB_CONNECT@
#  if @HAVE_WINSOCK2_H@
#   undef connect
#   define connect		rpl_connect
extern int rpl_connect (int, struct sockaddr *, int);
#  endif
# elif @HAVE_WINSOCK2_H@
#  undef connect
#  define connect socket_used_without_requesting_gnulib_module_connect
# elif defined GNULIB_POSIXCHECK
#  undef connect
#  define connect(s,a,l) \
     (GL_LINK_WARNING ("connect is not always POSIX compliant - " \
                       "use gnulib module connect for portability"), \
      connect (s, a, l))
# endif

# if @GNULIB_ACCEPT@
#  if @HAVE_WINSOCK2_H@
#   undef accept
#   define accept		rpl_accept
extern int rpl_accept (int, struct sockaddr *, int *);
#  endif
# elif @HAVE_WINSOCK2_H@
#  undef accept
#  define accept accept_used_without_requesting_gnulib_module_accept
# elif defined GNULIB_POSIXCHECK
#  undef accept
#  define accept(s,a,l) \
     (GL_LINK_WARNING ("accept is not always POSIX compliant - " \
                       "use gnulib module accept for portability"), \
      accept (s, a, l))
# endif

# if @GNULIB_BIND@
#  if @HAVE_WINSOCK2_H@
#   undef bind
#   define bind			rpl_bind
extern int rpl_bind (int, struct sockaddr *, int);
#  endif
# elif @HAVE_WINSOCK2_H@
#  undef bind
#  define bind bind_used_without_requesting_gnulib_module_bind
# elif defined GNULIB_POSIXCHECK
#  undef bind
#  define bind(s,a,l) \
     (GL_LINK_WARNING ("bind is not always POSIX compliant - " \
                       "use gnulib module bind for portability"), \
      bind (s, a, l))
# endif

# if @GNULIB_GETPEERNAME@
#  if @HAVE_WINSOCK2_H@
#   undef getpeername
#   define getpeername		rpl_getpeername
extern int rpl_getpeername (int, struct sockaddr *, int *);
#  endif
# elif @HAVE_WINSOCK2_H@
#  undef getpeername
#  define getpeername getpeername_used_without_requesting_gnulib_module_getpeername
# elif defined GNULIB_POSIXCHECK
#  undef getpeername
#  define getpeername(s,a,l) \
     (GL_LINK_WARNING ("getpeername is not always POSIX compliant - " \
                       "use gnulib module getpeername for portability"), \
      getpeername (s, a, l))
# endif

# if @GNULIB_GETSOCKNAME@
#  if @HAVE_WINSOCK2_H@
#   undef getsockname
#   define getsockname		rpl_getsockname
extern int rpl_getsockname (int, struct sockaddr *, int *);
#  endif
# elif @HAVE_WINSOCK2_H@
#  undef getsockname
#  define getsockname getsockname_used_without_requesting_gnulib_module_getsockname
# elif defined GNULIB_POSIXCHECK
#  undef getsockname
#  define getsockname(s,a,l) \
     (GL_LINK_WARNING ("getsockname is not always POSIX compliant - " \
                       "use gnulib module getsockname for portability"), \
      getsockname (s, a, l))
# endif

# if @GNULIB_GETSOCKOPT@
#  if @HAVE_WINSOCK2_H@
#   undef getsockopt
#   define getsockopt		rpl_getsockopt
extern int rpl_getsockopt (int, int, int, void *, socklen_t *);
#  endif
# elif @HAVE_WINSOCK2_H@
#  undef getsockopt
#  define getsockopt getsockopt_used_without_requesting_gnulib_module_getsockopt
# elif defined GNULIB_POSIXCHECK
#  undef getsockopt
#  define getsockopt(s,lvl,o,v,l) \
     (GL_LINK_WARNING ("getsockopt is not always POSIX compliant - " \
                       "use gnulib module getsockopt for portability"), \
      getsockopt (s, lvl, o, v, l))
# endif

# if @GNULIB_LISTEN@
#  if @HAVE_WINSOCK2_H@
#   undef listen
#   define listen		rpl_listen
extern int rpl_listen (int, int);
#  endif
# elif @HAVE_WINSOCK2_H@
#  undef listen
#  define listen listen_used_without_requesting_gnulib_module_listen
# elif defined GNULIB_POSIXCHECK
#  undef listen
#  define listen(s,b) \
     (GL_LINK_WARNING ("listen is not always POSIX compliant - " \
                       "use gnulib module listen for portability"), \
      listen (s, b))
# endif

# if @GNULIB_RECV@
#  if @HAVE_WINSOCK2_H@
#   undef recv
#   define recv			rpl_recv
extern int rpl_recv (int, void *, int, int);
#  endif
# elif @HAVE_WINSOCK2_H@
#  undef recv
#  define recv recv_used_without_requesting_gnulib_module_recv
# elif defined GNULIB_POSIXCHECK
#  undef recv
#  define recv(s,b,n,f) \
     (GL_LINK_WARNING ("recv is not always POSIX compliant - " \
                       "use gnulib module recv for portability"), \
      recv (s, b, n, f))
# endif

# if @GNULIB_SEND@
#  if @HAVE_WINSOCK2_H@
#   undef send
#   define send			rpl_send
extern int rpl_send (int, const void *, int, int);
#  endif
# elif @HAVE_WINSOCK2_H@
#  undef send
#  define send send_used_without_requesting_gnulib_module_send
# elif defined GNULIB_POSIXCHECK
#  undef send
#  define send(s,b,n,f) \
     (GL_LINK_WARNING ("send is not always POSIX compliant - " \
                       "use gnulib module send for portability"), \
      send (s, b, n, f))
# endif

# if @GNULIB_RECVFROM@
#  if @HAVE_WINSOCK2_H@
#   undef recvfrom
#   define recvfrom		rpl_recvfrom
extern int rpl_recvfrom (int, void *, int, int, struct sockaddr *, int *);
#  endif
# elif @HAVE_WINSOCK2_H@
#  undef recvfrom
#  define recvfrom recvfrom_used_without_requesting_gnulib_module_recvfrom
# elif defined GNULIB_POSIXCHECK
#  undef recvfrom
#  define recvfrom(s,b,n,f,a,l) \
     (GL_LINK_WARNING ("recvfrom is not always POSIX compliant - " \
                       "use gnulib module recvfrom for portability"), \
      recvfrom (s, b, n, f, a, l))
# endif

# if @GNULIB_SENDTO@
#  if @HAVE_WINSOCK2_H@
#   undef sendto
#   define sendto		rpl_sendto
extern int rpl_sendto (int, const void *, int, int, struct sockaddr *, int);
#  endif
# elif @HAVE_WINSOCK2_H@
#  undef sendto
#  define sendto sendto_used_without_requesting_gnulib_module_sendto
# elif defined GNULIB_POSIXCHECK
#  undef sendto
#  define sendto(s,b,n,f,a,l) \
     (GL_LINK_WARNING ("sendto is not always POSIX compliant - " \
                       "use gnulib module sendto for portability"), \
      sendto (s, b, n, f, a, l))
# endif

# if @GNULIB_SETSOCKOPT@
#  if @HAVE_WINSOCK2_H@
#   undef setsockopt
#   define setsockopt		rpl_setsockopt
extern int rpl_setsockopt (int, int, int, const void *, socklen_t);
#  endif
# elif @HAVE_WINSOCK2_H@
#  undef setsockopt
#  define setsockopt setsockopt_used_without_requesting_gnulib_module_setsockopt
# elif defined GNULIB_POSIXCHECK
#  undef setsockopt
#  define setsockopt(s,lvl,o,v,l) \
     (GL_LINK_WARNING ("setsockopt is not always POSIX compliant - " \
                       "use gnulib module setsockopt for portability"), \
      setsockopt (s, lvl, o, v, l))
# endif

# if @GNULIB_SHUTDOWN@
#  if @HAVE_WINSOCK2_H@
#   undef shutdown
#   define shutdown		rpl_shutdown
extern int rpl_shutdown (int, int);
#  endif
# elif @HAVE_WINSOCK2_H@
#  undef shutdown
#  define shutdown shutdown_used_without_requesting_gnulib_module_shutdown
# elif defined GNULIB_POSIXCHECK
#  undef shutdown
#  define shutdown(s,h) \
     (GL_LINK_WARNING ("shutdown is not always POSIX compliant - " \
                       "use gnulib module shutdown for portability"), \
      shutdown (s, h))
# endif

# if @HAVE_WINSOCK2_H@
#  undef select
#  define select		select_used_without_including_sys_select_h
# endif

# ifdef __cplusplus
}
# endif

#endif /* HAVE_SYS_SOCKET_H */

#endif /* _GL_SYS_SOCKET_H */
#endif /* _GL_SYS_SOCKET_H */