/*
 * net_sys.h -- common network system header.
 *
 * Copyright (C) 2007-2012  O.Sezer <sezero@users.sourceforge.net>
 *
 * 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 2 of the License, 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
 */

#ifndef spingle__net_sys_h
#define spingle__net_sys_h

#include <sys/types.h>
#include <errno.h>
#include <stddef.h>
#include <limits.h>

#if PLATFORM_IS(BSD) || PLATFORM_IS(OSX)
/* struct sockaddr has uint8_t sa_len as the first member in BSD
 * variants and the family member is also an uint8_t instead of an
 * uint16_t. This should matter only when PLATFORM_UNIX is defined,
 * however, checking for the offset of sa_family in every platform that
 * provide a struct sockaddr doesn't hurt either (see down below for the
 * compile time asserts.) */
/* FIXME : GET RID OF THIS ABOMINATION !!! */
#define HAVE_SA_LEN     1
#define SA_FAM_OFFSET   1
#else
#undef  HAVE_SA_LEN
#define SA_FAM_OFFSET   0
#endif  /* BSD, sockaddr */

/* unix includes and compatibility macros */
#if PLATFORM_IS_UNIX
#include <sys/param.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>

typedef int32_t sys_socket_t;
#define INVALID_SOCKET  (-1)
#define SOCKET_ERROR    (-1)

#define SOCKETERRNO     errno
#define ioctlsocket     ioctl
#define closesocket     close
#define selectsocket    select
#define IOCTLARG_P(x)   /* (char *) */ x

#define NET_EWOULDBLOCK         EWOULDBLOCK
#define NET_ECONNREFUSED        ECONNREFUSED

#define socketerror(x)  strerror((x))

_Static_assert(offsetof(struct sockaddr, sa_family) == SA_FAM_OFFSET,
               "HAVE_SA_LEN not defined correctly");
#endif /* PLATFORM_IS_UNIX */

/* windows includes and compatibility macros */
#if PLATFORM_IS(WINDOWS)

/* NOTE: winsock[2].h already includes windows.h */
#if !defined(_USE_WINSOCK2)
#include <winsock.h>
#else
#include <winsock2.h>
#include <ws2tcpip.h>
#endif

/* there is no in_addr_t on windows: define it as
   the type of the S_addr of in_addr structure */
typedef u_long  in_addr_t;      /* uint32_t */

/* on windows, socklen_t is to be a winsock2 thing */
#if !defined(IP_MSFILTER_SIZE)
typedef int32_t socklen_t;
#endif  /* socklen_t type */

typedef SOCKET  sys_socket_t;

#define selectsocket    select
#define IOCTLARG_P(x)   /* (u_long *) */ x

#define SOCKETERRNO     WSAGetLastError()
#define NET_EWOULDBLOCK         WSAEWOULDBLOCK
#define NET_ECONNREFUSED        WSAECONNREFUSED
/* must #include "wsaerror.h" for this : */
#define socketerror(x)  __WSAE_StrError((x))

_Static_assert(offsetof(struct sockaddr, sa_family) == SA_FAM_OFFSET,
               "HAVE_SA_LEN not defined correctly");

#endif  /* end of windows stuff */


/* macros which may still be missing */

#if !defined(INADDR_NONE)
#define INADDR_NONE     ((in_addr_t) 0xffffffff)
#endif  /* INADDR_NONE */

#if !defined(INADDR_LOOPBACK)
#define INADDR_LOOPBACK ((in_addr_t) 0x7f000001)        /* 127.0.0.1    */
#endif  /* INADDR_LOOPBACK */


#if !defined(MAXHOSTNAMELEN)
/* SUSv2 guarantees that `Host names are limited to 255 bytes'.
   POSIX 1003.1-2001 guarantees that `Host names (not including
   the terminating NUL) are limited to HOST_NAME_MAX bytes'. */
#define MAXHOSTNAMELEN          256
#endif  /* MAXHOSTNAMELEN */


#endif