/* $Id: socket.h 1154 2004-02-03 19:56:37Z bird $ */
/** @file
 *
 * Interal libsocket stuff.
 *
 * Copyright (c) 2003 knut st. osmundsen <bird-srcspam@anduin.net>
 *
 *
 * This file is part of Innotek LIBC.
 *
 * Innotek LIBC 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.
 *
 * Innotek LIBC 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 Innotek LIBC; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#ifndef __socket_h__
#define __socket_h__


/** @group libsocket    libsocket
 * @{
 */

/*******************************************************************************
*   Defined Constants And Macros                                               *
*******************************************************************************/
/** The offset the OS/2 TCP/IP errno values are skewed compared to the
 * LIBC errno values. */
#define EOS2_TCPIP_OFFSET   10000

/** Get the low word of the ioctl request number.
 * Used to support ioctl request numbers from old and new _IOC macros.
 */
#define __IOCLW(a) ((unsigned short)(a))

#ifndef TCPV40HDRS

#define V5_FD_SETSIZE      64
#define V5_FD_SET(fd, set) do { \
   /* if (((v5_fd_set *)(set))->fd_count < V5_FD_SETSIZE) - calcsize fixes this */ \
        ((v5_fd_set *)(set))->fd_array[((v5_fd_set *)(set))->fd_count++]=fd;\
} while(0)
#define V5_FD_ISSET(fd, set)    v5_isset(fd, set)

#endif


/*******************************************************************************
*   Structures and Typedefs                                                    *
*******************************************************************************/
/** Socket handle.*/
typedef struct __libc_SocketHandle
{
    /** the common fh core. */
    LIBCFH      core;

    /** OS/2 socket number. */
    int         iSocket;
} LIBCSOCKETFH, *PLIBCSOCKETFH;


#ifndef TCPV40HDRS

#pragma pack(4)
/** OS/2 oddities from the BSD 4.4 stack. */
typedef struct v5_fd_set {
        u_short fd_count;               /* how many are SET? */
        int     fd_array[V5_FD_SETSIZE];/* an array of SOCKETs */
} v5_fd_set;
#pragma pack()

/** internal helper */
static inline int v5_isset(int fd, const struct v5_fd_set *set)
{
    const int  *pfd = &set->fd_array[0];
    int         c   = set->fd_count;
    while (c > 0)
    {
        if (*pfd == fd)
            return 1;
        pfd++;
        c--;
    }
    return 0;
}

#endif


/*******************************************************************************
*   Global Variables                                                           *
*******************************************************************************/
extern LIBCFHOPS __libsocket_gSocketOps;


/*******************************************************************************
*   Internal Functions                                                         *
*******************************************************************************/
/** @defgroup libsocket_renamed     Renamed Imports.
 * @{ */
int     TCPCALL __libsocket_accept(int, struct sockaddr *, int *);
int     TCPCALL __libsocket_bind(int, __const__ struct sockaddr *, int);
int     TCPCALL __libsocket_connect(int, __const__ struct sockaddr *, int);
int     TCPCALL __libsocket_getpeername(int, struct sockaddr *, int *);
int     TCPCALL __libsocket_getsockname(int, struct sockaddr *, int *);
int     TCPCALL __libsocket_getsockopt(int, int, int, void *, int *);
int     TCPCALL __libsocket_ioctl(int, int, char *);
int     TCPCALL __libsocket_listen(int, int);
int     TCPCALL __libsocket_os2_ioctl(int, unsigned long, char *, int);
int     TCPCALL __libsocket_os2_select(int *, int, int, int, long);
int     TCPCALL __libsocket_recv(int, void *, int, int);
int     TCPCALL __libsocket_recv(int, void *, int, int);
int     TCPCALL __libsocket_recvfrom(int, void *, int, int, struct sockaddr *, int *);
int     TCPCALL __libsocket_recvmsg(int, struct msghdr *, int);
int     TCPCALL __libsocket_send(int, __const__ void *, int, int);
int     TCPCALL __libsocket_send(int, const void *, int, int);
int     TCPCALL __libsocket_sendmsg(int, __const__ struct msghdr *, int);
int     TCPCALL __libsocket_sendto(int, __const__ void *, int, int, __const__ struct sockaddr *, int);
int     TCPCALL __libsocket_setsockopt(int, int, int, __const__ void *, int);
int     TCPCALL __libsocket_shutdown(int, int);
int     TCPCALL __libsocket_sock_errno(void);
int     TCPCALL __libsocket_socket(int, int, int);
int     TCPCALL __libsocket_socket(int, int, int);
int     TCPCALL __libsocket_socketpair(int, int, int, int *);
int     TCPCALL __libsocket_soclose(int);
int     TCPCALL __libsocket_accept_and_recv(long, long*, struct sockaddr *, long*, struct sockaddr*, long*, caddr_t, size_t);
void    TCPCALL __libsocket_addsockettolist(int);
int     TCPCALL __libsocket_removesocketfromlist(int);
ssize_t TCPCALL __libsocket_so_readv(int, struct iovec *, int);
ssize_t TCPCALL __libsocket_so_writev(int, struct iovec *, int);
int     TCPCALL __libsocket_so_cancel(int);
int     TCPCALL __libsocket_soabort(int);
int     TCPCALL __libsocket_Raccept(int, struct sockaddr *, int *);
struct sockaddr_in;
int     TCPCALL __libsocket_tcpip4_Rbind(int, struct sockaddr_in *, int, struct sockaddr_in *);
int     TCPCALL __libsocket_Rbind(int, struct sockaddr *, int, struct sockaddr *);
int     TCPCALL __libsocket_Rconnect(int, const struct sockaddr *, int);
int     TCPCALL __libsocket_Rgetsockname(int, struct sockaddr *, int *);
int     TCPCALL __libsocket_Rlisten(int, int);
#ifndef TCPV40HDRS
ssize_t TCPCALL __libsocket_send_file(int *, struct sf_parms *, int );
#endif
char *  TCPCALL __libsocket_sock_strerror(int);
int     TCPCALL __libsocket_pair(int af, int type, int flags, int *osfd);
#ifdef TCPV40HDRS
int     TCPCALL __libsocket_bsdselect(int, fd_set *, fd_set *, fd_set *, struct timeval *);
#else
int     TCPCALL __libsocket_bsdselect(int, v5_fd_set *, v5_fd_set *, v5_fd_set *, struct timeval *);
#endif
void    TCPCALL __libsocket_set_errno(int);
/** @} */


/** @defgroup libsocket_internal    Internal helpers.
 * @{ */
/**
 * Sets the LIBC and socket errno variables to a given error number.
 */
static inline void  __libsocket_setErrno(int err)
{
    errno = err;
    __libsocket_set_errno(err + EOS2_TCPIP_OFFSET);
}

/**
 * Updates the LIBC errno with the latest socket error.
 */
static inline void  __libsocket_setLibcErrno(void)
{
    int err = __libsocket_sock_errno();
    if (err >= EOS2_TCPIP_OFFSET && err < EOS2_TCPIP_OFFSET + 1000)
        errno = err - EOS2_TCPIP_OFFSET;
}

/**
 * Updates the socket errno with the latest LIBC error.
 */
static inline void  __libsocket_setSocketErrno(void)
{
    __libsocket_set_errno(errno + EOS2_TCPIP_OFFSET);
}

/**
 * Gets the socket errno translating it to a LIBC errno.
 */
static inline int   __libsocket_getSocketErrno(void)
{
    int err = __libsocket_sock_errno();
    if (err >= EOS2_TCPIP_OFFSET && err < EOS2_TCPIP_OFFSET + 1000)
        return err - EOS2_TCPIP_OFFSET;
    return EDOOFUS;
}


/**
 * Retrieve the socket handle structure for a given handle.
 * @returns Pointer to socket handle structure on success.
 * @returns NULL on failure with errno set to the appropriate value.
 * @param   socket  Socket handle number.
 */
static inline PLIBCSOCKETFH   __libsocket_FH(int socket)
{
    PLIBCSOCKETFH   pFHSocket = (PLIBCSOCKETFH)__libc_FH(socket);
    if (pFHSocket)
    {
        if ((pFHSocket->core.fFlags & F_TYPEMASK) == F_SOCKET)
            return pFHSocket;
        __libsocket_setErrno(ENOSYS);
    }
    else
        __libsocket_setErrno(EBADF);
    return NULL;
}

/** @} */


/** @} */

#endif