1 /* Copyright (C) 1992-2021 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
__socket(int domain,int type,int protocol)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)
79