sysdeps/mach/hurd/socket.c

   1 /* Copyright (C) 1992-2018 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <sys/socket.h>
  20 #include <hurd.h>
  21 #include <hurd/socket.h>
  22 #include <hurd/fd.h>
  23 #include <fcntl.h>
  24
  25 /* Create a new socket of type TYPE in domain DOMAIN, using
  26    protocol PROTOCOL.  If PROTOCOL is zero, one is chosen automatically.
  27    Returns a file descriptor for the new socket, or -1 for errors.  */
  28 int
  29 __socket (int domain, int type, int protocol)
  30 {
  31   error_t err;
  32   socket_t sock, server;
  33
  34   /* Find the socket server for DOMAIN.  */
  35   server = _hurd_socket_server (domain, 0);
  36   if (server == MACH_PORT_NULL)
  37     return -1;
  38
  39   err = __socket_create (server, type, protocol, &sock);
  40   if (err == MACH_SEND_INVALID_DEST || err == MIG_SERVER_DIED
  41       || err == MIG_BAD_ID || err == EOPNOTSUPP)
  42     {
  43       /* On the first use of the socket server during the operation,
  44          allow for the old server port dying.  */
  45       server = _hurd_socket_server (domain, 1);
  46       if (server == MACH_PORT_NULL)
  47         return -1;
  48       err = __socket_create (server, type, protocol, &sock);
  49     }
  50
  51   /* These errors all mean that the server node doesn't support the
  52      socket.defs protocol, which we'll take to mean that the protocol
  53      isn't supported.  */
  54   if (err == MACH_SEND_INVALID_DEST || err == MIG_SERVER_DIED
  55       || err == MIG_BAD_ID || err == EOPNOTSUPP)
  56     err = EAFNOSUPPORT;
  57
  58   if (err)
  59     return __hurd_fail (err);
  60
  61   return _hurd_intern_fd (sock, O_IGNORE_CTTY, 1);
  62 }
  63
  64 libc_hidden_def (__socket)
  65 weak_alias (__socket, socket)