pjlib/include/pj/compat/socket.h

/* $Id$ */
/* 
 * Copyright (C)2003-2008 Benny Prijono <benny@prijono.org>
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
 */
#ifndef __PJ_COMPAT_SOCKET_H__
#define __PJ_COMPAT_SOCKET_H__

/**
 * @file socket.h
 * @brief Provides all socket related functions,data types, error codes, etc.
 */

#if defined(PJ_HAS_WINSOCK2_H) && PJ_HAS_WINSOCK2_H != 0
#  include <winsock2.h>
#endif

#if defined(PJ_HAS_WINSOCK_H) && PJ_HAS_WINSOCK_H != 0
#  include <winsock.h>
#endif

/*
 * IPv6 for Visual Studio's
 *
 * = Visual Studio 6 =
 *
 * Visual Studio 6 does not ship with IPv6 support, so you MUST
 * download and install IPv6 Tehnology Preview (IPv6Kit) from:
 *    http://msdn.microsoft.com/downloads/sdks/platform/tpipv6/ReadMe.asp
 * Then put IPv6Kit\inc in your Visual Studio include path.
 * 
 * In addition, by default IPv6Kit does not want to install on
 * Windows 2000 SP4. Please see:
 *    http://msdn.microsoft.com/downloads/sdks/platform/tpipv6/faq.asp
 * on  how to install IPv6Kit on Win2K SP4.
 *
 *
 * = Visual Studio 2003, 2005 (including Express) =
 *
 * These VS uses Microsoft Platform SDK for Windows Server 2003 SP1, and
 * it has built-in IPv6 support.
 */
#if defined(_MSC_VER) && defined(PJ_HAS_IPV6) && PJ_HAS_IPV6!=0
#   ifndef s_addr
#	define s_addr  S_un.S_addr
#   endif

#   include <ws2tcpip.h>

#   ifndef IPPROTO_IPV6
	/* Need to download and install IPv6Kit for this platform.
	 * Please see the comments above about Visual Studio 6.
	 */
#	include <tpipv6.h>
#   endif

#   define PJ_SOCK_HAS_GETADDRINFO  1
#endif	/* _MSC_VER */


#if defined(PJ_HAS_SYS_TYPES_H) && PJ_HAS_SYS_TYPES_H != 0
#  include <sys/types.h>
#endif

#if defined(PJ_HAS_SYS_SOCKET_H) && PJ_HAS_SYS_SOCKET_H != 0
#  include <sys/socket.h>
#endif

#if defined(PJ_HAS_LINUX_SOCKET_H) && PJ_HAS_LINUX_SOCKET_H != 0
#  include <linux/socket.h>
#endif

#if defined(PJ_HAS_SYS_SELECT_H) && PJ_HAS_SYS_SELECT_H != 0
#  include <sys/select.h>
#endif

#if defined(PJ_HAS_NETINET_IN_H) && PJ_HAS_NETINET_IN_H != 0
#  include <netinet/in.h>
#endif

#if defined(PJ_HAS_NETINET_IP_H) && PJ_HAS_NETINET_IP_H != 0
/* To pull in IPTOS_* constants */
#  include <netinet/ip.h>
#endif

#if defined(PJ_HAS_NET_IF_H) && PJ_HAS_NET_IF_H != 0
/* For interface enumeration in ip_helper */
#   include <net/if.h>
#endif

#if defined(PJ_HAS_IFADDRS_H) && PJ_HAS_IFADDRS_H != 0
/* Interface enum with getifaddrs() which works with IPv6 */
#   include <ifaddrs.h>
#endif

#if defined(PJ_HAS_ARPA_INET_H) && PJ_HAS_ARPA_INET_H != 0
#  include <arpa/inet.h>
#endif

#if defined(PJ_HAS_SYS_IOCTL_H) && PJ_HAS_SYS_IOCTL_H != 0
#  include <sys/ioctl.h>	/* FBIONBIO */
#endif

#if defined(PJ_HAS_ERRNO_H) && PJ_HAS_ERRNO_H != 0
#  include <errno.h>
#endif

#if defined(PJ_HAS_NETDB_H) && PJ_HAS_NETDB_H != 0
#  include <netdb.h>
#endif

#if defined(PJ_HAS_UNISTD_H) && PJ_HAS_UNISTD_H != 0
#  include <unistd.h>
#endif


/*
 * Define common errors.
 */
#if (defined(PJ_WIN32) && PJ_WIN32!=0) || \
    (defined(PJ_WIN32_WINCE) && PJ_WIN32_WINCE!=0)
#  define OSERR_EWOULDBLOCK    WSAEWOULDBLOCK
#  define OSERR_EINPROGRESS    WSAEINPROGRESS
#  define OSERR_ECONNRESET     WSAECONNRESET
#  define OSERR_ENOTCONN       WSAENOTCONN
#elif defined(PJ_SYMBIAN) && PJ_SYMBIAN!=0
#  define OSERR_EWOULDBLOCK    -1
#  define OSERR_EINPROGRESS    -1
#  define OSERR_ECONNRESET     -1
#  define OSERR_ENOTCONN       -1
#else
#  define OSERR_EWOULDBLOCK    EWOULDBLOCK
#  define OSERR_EINPROGRESS    EINPROGRESS
#  define OSERR_ECONNRESET     ECONNRESET
#  define OSERR_ENOTCONN       ENOTCONN
#endif


/*
 * And undefine these..
 */
#undef s_addr
#undef s6_addr

/*
 * Linux kernel specifics
 */
#if defined(PJ_LINUX_KERNEL)
#   include <linux/net.h>
#   include <asm/ioctls.h>		/* FIONBIO	*/
#   include <linux/syscalls.h>	/* sys_select() */
#   include <asm/uaccess.h>	/* set/get_fs()	*/

    typedef int socklen_t;
#   define getsockopt  sys_getsockopt

    /*
     * Wrapper for select() in Linux kernel.
     */
    PJ_INLINE(int) select(int n, fd_set *inp, fd_set *outp, fd_set *exp,
		          struct timeval *tvp)
    {
        int count;
        mm_segment_t oldfs = get_fs();
        set_fs(KERNEL_DS);
        count = sys_select(n, inp, outp, exp, tvp);
        set_fs(oldfs);
        return count;
    }
#endif	/* PJ_LINUX_KERNEL */


/*
 * This will finally be obsoleted, since it should be declared in
 * os_auto.h
 */
#if !defined(PJ_HAS_SOCKLEN_T) || PJ_HAS_SOCKLEN_T==0
    typedef int socklen_t;
#endif

/* Regarding sin_len member of sockaddr_in:
 *  BSD systems (including MacOS X requires that the sin_len member of 
 *  sockaddr_in be set to sizeof(sockaddr_in), while other systems (Windows
 *  and Linux included) do not.
 *
 *  To maintain compatibility between systems, PJLIB will automatically
 *  set this field before invoking native OS socket API, and it will
 *  always reset the field to zero before returning pj_sockaddr_in to
 *  application (such as in pj_getsockname() and pj_recvfrom()).
 *
 *  Application MUST always set this field to zero.
 *
 *  This way we can avoid hard to find problem such as when the socket 
 *  address is used as hash table key.
 */
#if defined(PJ_SOCKADDR_HAS_LEN) && PJ_SOCKADDR_HAS_LEN!=0
#   define PJ_SOCKADDR_SET_LEN(addr,len) (((pj_addr_hdr*)(addr))->sa_zero_len=(len))
#   define PJ_SOCKADDR_RESET_LEN(addr)   (((pj_addr_hdr*)(addr))->sa_zero_len=0)
#else
#   define PJ_SOCKADDR_SET_LEN(addr,len) 
#   define PJ_SOCKADDR_RESET_LEN(addr)
#endif

#endif	/* __PJ_COMPAT_SOCKET_H__ */