lib/network.h

   1 /*
   2  * Network library header.
   3  * Copyright (C) 1998 Kunihiro Ishiguro
   4  *
   5  * This file is part of GNU Zebra.
   6  *
   7  * GNU Zebra is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2, or (at your option) any
  10  * later version.
  11  *
  12  * GNU Zebra is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with GNU Zebra; see the file COPYING.  If not, write to the Free
  19  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  20  * 02111-1307, USA.
  21  */
  22
  23 #ifndef _ZEBRA_NETWORK_H
  24 #define _ZEBRA_NETWORK_H
  25
  26 /* Both readn and writen are deprecated and will be removed.  They are not
  27    suitable for use with non-blocking file descriptors.
  28  */
  29 extern int readn (int, u_char *, int);
  30 extern int writen (int, const u_char *, int);
  31
  32 /* Set the file descriptor to use non-blocking I/O.  Returns 0 for success,
  33    -1 on error. */
  34 extern int set_nonblocking(int fd);
  35
  36 /* Does the I/O error indicate that the operation should be retried later? */
  37 #define ERRNO_IO_RETRY(EN) \
  38         (((EN) == EAGAIN) || ((EN) == EWOULDBLOCK) || ((EN) == EINTR))
  39
  40 #endif /* _ZEBRA_NETWORK_H */