1  /* Copyright (C) 1992-2023 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     <https://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  #include <fcntl-internal.h>
      25  
      26  /* Create a new socket of type TYPE in domain DOMAIN, using
      27     protocol PROTOCOL.  If PROTOCOL is zero, one is chosen automatically.
      28     Returns a file descriptor for the new socket, or -1 for errors.  */
      29  int
      30  __socket (int domain, int type, int protocol)
      31  {
      32    error_t err;
      33    socket_t sock, server;
      34    int flags = sock_to_o_flags (type & ~SOCK_TYPE_MASK);
      35    type &= SOCK_TYPE_MASK;
      36  
      37    if (flags & ~(O_CLOEXEC | O_NONBLOCK))
      38      return __hurd_fail (EINVAL);
      39  
      40    /* Find the socket server for DOMAIN.  */
      41    server = _hurd_socket_server (domain, 0);
      42    if (server == MACH_PORT_NULL)
      43      return -1;
      44  
      45    err = __socket_create (server, type, protocol, &sock);
      46    if (err == MACH_SEND_INVALID_DEST || err == MIG_SERVER_DIED
      47        || err == MIG_BAD_ID || err == EOPNOTSUPP)
      48      {
      49        /* On the first use of the socket server during the operation,
      50  	 allow for the old server port dying.  */
      51        server = _hurd_socket_server (domain, 1);
      52        if (server == MACH_PORT_NULL)
      53  	return -1;
      54        err = __socket_create (server, type, protocol, &sock);
      55      }
      56  
      57    /* These errors all mean that the server node doesn't support the
      58       socket.defs protocol, which we'll take to mean that the protocol
      59       isn't supported.  */
      60    if (err == MACH_SEND_INVALID_DEST || err == MIG_SERVER_DIED
      61        || err == MIG_BAD_ID || err == EOPNOTSUPP)
      62      err = EAFNOSUPPORT;
      63  
      64    if (! err)
      65      {
      66        if (flags & O_NONBLOCK)
      67  	err = __io_set_some_openmodes (sock, O_NONBLOCK);
      68        /* TODO: do we need special ERR massaging after the previous call?  */
      69      }
      70  
      71    if (err)
      72      return __hurd_fail (err);
      73  
      74    return _hurd_intern_fd (sock, O_IGNORE_CTTY | flags, 1);
      75  }
      76  
      77  libc_hidden_def (__socket)
      78  weak_alias (__socket, socket)