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udp_opts.cc

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// This is neccessary to avoid muliple definitions of fd_set, etc when both
// RPC via PCNFS and Windows Sockets are to be available
#ifdef USE_PCNFS
#undef USE_PCNFS
#endif


#include "rcs_defs.hh"          /* _Windows, EXTERN_C_STD_HEADERS */
#include "sokintrf.h"           // all the socket defs
#include "udp_opts.hh"
#include "rcs_prnt.hh"          /* rcs_print_error()  */

#ifdef UNIX_LIKE_PLAT
#ifdef qnx
#include <fcntl.h>              // fcntl, O_NONBLOCK
#else
#include <sys/fcntl.h>          // fcntl, O_NONBLOCK
#endif
#include <errno.h>              // errno
#include <string.h>             // strerror()
#endif

#ifdef sunos5
#include <sys/types.h>
#include <fcntl.h>
#endif

int
set_udp_socket_options (int socket_fd)
{
  if (socket_fd <= 0)
    {
      return -1;
    }
  int optval = 1;
  if (dl_setsockopt (socket_fd, SOL_SOCKET, SO_REUSEADDR,
                     (char *) &optval, sizeof (optval)) < 0)
    {
      rcs_print_error (" Can`t set a socket option.\n");
#ifndef UNDER_CE
      rcs_print_error ("errno = %d = %s\n", errno, strerror (errno));
#endif
      return -1;;
    }
#if 0
  if (-1 == fcntl (socket_fd, F_SETFL, O_NDELAY))
    {
      rcs_print_error ("Couldn's set flag for no delay on socket.\n");
    }
#endif
  return (0);
}


int RCS_EXPORT
make_udp_socket_nonblocking (int socket_fd)
{
#ifdef _Windows
  unsigned long long_arg = 1;
  if (dl_ioctlsocket (socket_fd, FIONBIO, &long_arg) < 0)
    {
      rcs_print_error ("Can't set  socket to non-blocking.");
    }
#else
#ifndef VXWORKS
#ifdef MSDOS
  int int_arg = 1;
  if (-1 == tk_ioctl (socket_fd, FIONBIO, &int_arg))
    {
      rcs_print_error ("Can't set  socket to non-blocking. : %d %s\n",
                       tk_geterrno (socket_fd), tk_sperror ());
      return -1;
    }
#else


#if defined(O_NDELAY) && !defined(O_NONBLOCK)
  if (-1 == fcntl (socket_fd, F_SETFL, O_NDELAY))
    {
      rcs_print_error ("Couldn's set flag for no delay on socket.\n");
      return -1;
    }
#endif
#ifdef O_NONBLOCK
  if (-1 == fcntl (socket_fd, F_SETFL, O_NONBLOCK))
    {
      rcs_print_error ("Couldn's set flag for non-blocking on socket.\n");
      return -1;
    }
#endif
#endif
#else
// VXWORKS
  if (-1 == ioctl (socket_fd, FIONBIO, 1))
    {
      rcs_print_error ("Couldn's set flag for non-blocking on socket.\n");
      return -1;
    }
#endif
#endif
  return (0);
}


int RCS_EXPORT
make_udp_socket_blocking (int socket_fd)
{
#ifdef _Windows
  unsigned long long_arg = 0;
  if (dl_ioctlsocket (socket_fd, FIONBIO, &long_arg) < 0)
    {
      rcs_print_error ("Can't set  socket to non-blocking.");
    }
#else
#ifndef VXWORKS
#ifdef MSDOS
  int int_arg = 0;
  if (-1 == tk_ioctl (socket_fd, FIONBIO, &int_arg))
    {
      rcs_print_error ("Can't set  socket to non-blocking. : %d %s\n",
                       tk_geterrno (socket_fd), tk_sperror ());
      return -1;
    }
#else


#if defined(O_NONBLOCK) || defined(O_NDELAY)
  int val = fcntl (socket_fd, F_GETFL, 0);
  if (val < 0)
    {
      rcs_print_error ("fcntl error %d %s\n", errno, strerror (errno));
      return -1;
    }
#ifdef O_NONBLOCK
  val &= ~O_NONBLOCK;
#endif
#ifdef O_NDELAY
  val &= ~O_NDELAY;
#endif
  if (fcntl (socket_fd, F_SETFL, val) < 0)
    {
      rcs_print_error ("Couldn's set flag for blocking on socket.: %d,%s\n",
                       errno, strerror (errno));
      return -1;
    }
#endif
#endif

#else
// VXWORKS
  if (-1 == ioctl (socket_fd, FIONBIO, 0))
    {
      rcs_print_error ("Couldn's set flag for non-blocking on socket.\n");
      return -1;
    }
#endif
#endif
  return (0);
}



int RCS_EXPORT
make_udp_socket_broadcast (int socket_fd)
{
  if (socket_fd <= 0)
    {
      return -1;
    }
  int optval = 1;
  if (dl_setsockopt (socket_fd, SOL_SOCKET, SO_BROADCAST,
                     (char *) &optval, sizeof (optval)) < 0)
    {
      rcs_print_error ("setsockopt(%d,SOL_SOCKET,SO_\n");
#ifndef UNDER_CE
      rcs_print_error ("errno = %d = %s\n", errno, strerror (errno));
#endif
      return -1;;
    }
  return 0;
}

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