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 <fcntl.h> |
20 | #include <fcntl-internal.h> |
21 | #include <sys/socket.h> |
22 | #include <unistd.h> |
23 | |
24 | #include <hurd.h> |
25 | #include <hurd/fd.h> |
26 | #include <hurd/socket.h> |
27 | |
28 | /* Create two new sockets, of type TYPE in domain DOMAIN and using |
29 | protocol PROTOCOL, which are connected to each other, and put file |
30 | descriptors for them in FDS[0] and FDS[1]. If PROTOCOL is zero, |
31 | one will be chosen automatically. Returns 0 on success, -1 for errors. */ |
32 | int |
33 | __socketpair (int domain, int type, int protocol, int fds[2]) |
34 | { |
35 | error_t err; |
36 | socket_t server, sock1, sock2; |
37 | int d1, d2; |
38 | int flags = sock_to_o_flags (type & ~SOCK_TYPE_MASK); |
39 | type &= SOCK_TYPE_MASK; |
40 | |
41 | if (flags & ~(O_CLOEXEC | O_NONBLOCK)) |
42 | return __hurd_fail (EINVAL); |
43 | |
44 | if (fds == NULL) |
45 | return __hurd_fail (EINVAL); |
46 | |
47 | /* Find the domain's socket server. */ |
48 | server = _hurd_socket_server (domain, 0); |
49 | if (server == MACH_PORT_NULL) |
50 | return -1; |
51 | |
52 | /* Create two sockets and connect them together. */ |
53 | |
54 | err = __socket_create (server, type, protocol, &sock1); |
55 | if (err == MACH_SEND_INVALID_DEST || err == MIG_SERVER_DIED |
56 | || err == MIG_BAD_ID || err == EOPNOTSUPP) |
57 | { |
58 | /* On the first use of the socket server during the operation, |
59 | allow for the old server port dying. */ |
60 | server = _hurd_socket_server (domain, 1); |
61 | if (server == MACH_PORT_NULL) |
62 | return -1; |
63 | err = __socket_create (server, type, protocol, &sock1); |
64 | } |
65 | /* TODO: do we need special ERR massaging here, like it is done in |
66 | __socket? */ |
67 | if (! err) |
68 | { |
69 | if (flags & O_NONBLOCK) |
70 | err = __io_set_some_openmodes (sock1, O_NONBLOCK); |
71 | /* TODO: do we need special ERR massaging after the previous call? */ |
72 | } |
73 | if (err) |
74 | return __hurd_fail (err); |
75 | if (err = __socket_create (server, type, protocol, &sock2)) |
76 | { |
77 | __mach_port_deallocate (__mach_task_self (), sock1); |
78 | return __hurd_fail (err); |
79 | } |
80 | if (flags & O_NONBLOCK) |
81 | err = __io_set_some_openmodes (sock2, O_NONBLOCK); |
82 | /* TODO: do we need special ERR massaging after the previous call? */ |
83 | if (! err) |
84 | err = __socket_connect2 (sock1, sock2); |
85 | if (err) |
86 | { |
87 | __mach_port_deallocate (__mach_task_self (), sock1); |
88 | __mach_port_deallocate (__mach_task_self (), sock2); |
89 | return __hurd_fail (err); |
90 | } |
91 | |
92 | /* Put the sockets into file descriptors. */ |
93 | |
94 | d1 = _hurd_intern_fd (sock1, O_IGNORE_CTTY | flags, 1); |
95 | if (d1 < 0) |
96 | { |
97 | __mach_port_deallocate (__mach_task_self (), sock2); |
98 | return -1; |
99 | } |
100 | d2 = _hurd_intern_fd (sock2, O_IGNORE_CTTY | flags, 1); |
101 | if (d2 < 0) |
102 | { |
103 | err = errno; |
104 | (void) __close (d1); |
105 | return __hurd_fail (err); |
106 | } |
107 | |
108 | fds[0] = d1; |
109 | fds[1] = d2; |
110 | return 0; |
111 | } |
112 | |
113 | weak_alias (__socketpair, socketpair) |
114 | |