1 /* Copyright (C) 1992-2022 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/fd.h>
22 #include <hurd/socket.h>
23 #include <hurd/paths.h>
24 #include <fcntl.h>
25 #include <stddef.h>
26 #include <hurd/ifsock.h>
27 #include <sys/un.h>
28 #include "hurd/hurdsocket.h"
29
30 /* Give the socket FD the local address ADDR (which is LEN bytes long). */
31 int
__bind(int fd,__CONST_SOCKADDR_ARG addrarg,socklen_t len)32 __bind (int fd, __CONST_SOCKADDR_ARG addrarg, socklen_t len)
33 {
34 addr_port_t aport;
35 error_t err;
36 const struct sockaddr_un *addr = addrarg.__sockaddr_un__;
37
38 if (addr->sun_family == AF_LOCAL)
39 {
40 char *name = _hurd_sun_path_dupa (addr, len);
41 /* For the local domain, we must create a node in the filesystem
42 using the ifsock translator and then fetch the address from it. */
43 file_t dir, node, ifsock;
44 char *n;
45
46 dir = __file_name_split (name, &n);
47 if (dir == MACH_PORT_NULL)
48 return -1;
49
50 /* Create a new, unlinked node in the target directory. */
51 err = __dir_mkfile (dir, O_CREAT, 0666 & ~_hurd_umask, &node);
52
53 if (! err)
54 {
55 /* Set the node's translator to make it a local-domain socket. */
56 err = __file_set_translator (node,
57 FS_TRANS_EXCL | FS_TRANS_SET,
58 FS_TRANS_EXCL | FS_TRANS_SET, 0,
59 _HURD_IFSOCK, sizeof _HURD_IFSOCK,
60 MACH_PORT_NULL,
61 MACH_MSG_TYPE_COPY_SEND);
62 if (! err)
63 {
64 enum retry_type doretry;
65 char retryname[1024];
66 /* Get a port to the ifsock translator. */
67 err = __dir_lookup (node, "", 0, 0, &doretry, retryname, &ifsock);
68 if (! err && (doretry != FS_RETRY_NORMAL || retryname[0] != '\0'))
69 err = EADDRINUSE;
70 }
71 if (! err)
72 {
73 /* Get the address port. */
74 err = __ifsock_getsockaddr (ifsock, &aport);
75 if (err == MIG_BAD_ID || err == EOPNOTSUPP)
76 err = EGRATUITOUS;
77 if (! err)
78 {
79 /* Link the node, now a socket with proper mode, into the
80 target directory. */
81 err = __dir_link (dir, node, n, 1);
82 if (err == EEXIST)
83 err = EADDRINUSE;
84 if (err)
85 __mach_port_deallocate (__mach_task_self (), aport);
86 }
87 __mach_port_deallocate (__mach_task_self (), ifsock);
88 }
89 __mach_port_deallocate (__mach_task_self (), node);
90 }
91 __mach_port_deallocate (__mach_task_self (), dir);
92
93 if (err)
94 return __hurd_fail (err);
95 }
96 else
97 err = EIEIO;
98
99 err = HURD_DPORT_USE (fd,
100 ({
101 if (err)
102 err = __socket_create_address (port,
103 addr->sun_family,
104 (char *) addr, len,
105 &aport);
106 if (! err)
107 {
108 err = __socket_bind (port, aport);
109 __mach_port_deallocate (__mach_task_self (),
110 aport);
111 }
112 err;
113 }));
114
115 return err ? __hurd_dfail (fd, err) : 0;
116 }
117
118 weak_alias (__bind, bind)
119