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581c785b | 1 | /* Copyright (C) 1992-2022 Free Software Foundation, Inc. |
eb43375f TS |
2 | |
3 | This file is part of the GNU C Library. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
febb44a4 | 16 | License along with the GNU C Library; see the file COPYING.LIB. If |
5a82c748 | 17 | not, see <https://www.gnu.org/licenses/>. */ |
eb43375f TS |
18 | |
19 | #include <errno.h> | |
20 | #include <fcntl.h> | |
21 | #include <fcntl-internal.h> | |
22 | #include <string.h> | |
23 | #include <sys/socket.h> | |
24 | #include <hurd.h> | |
25 | #include <hurd/fd.h> | |
26 | #include <hurd/socket.h> | |
f5123211 | 27 | #include <sysdep-cancel.h> |
eb43375f TS |
28 | |
29 | /* Await a connection on socket FD. | |
30 | When a connection arrives, open a new socket to communicate with it, | |
31 | set *ADDRARG (which is *ADDR_LEN bytes long) to the address of the connecting | |
32 | peer and *ADDR_LEN to the address's actual length, and return the | |
33 | new socket's descriptor, or -1 for errors. The operation can be influenced | |
34 | by the FLAGS parameter. */ | |
35 | int | |
36 | __libc_accept4 (int fd, __SOCKADDR_ARG addrarg, socklen_t *addr_len, int flags) | |
37 | { | |
38 | error_t err; | |
39 | socket_t new; | |
40 | addr_port_t aport; | |
41 | struct sockaddr *addr = addrarg.__sockaddr__; | |
42 | char *buf = (char *) addr; | |
43 | mach_msg_type_number_t buflen; | |
44 | int type; | |
f5123211 | 45 | int cancel_oldtype; |
eb43375f TS |
46 | |
47 | flags = sock_to_o_flags (flags); | |
48 | ||
49 | if (flags & ~(O_CLOEXEC | O_NONBLOCK)) | |
50 | return __hurd_fail (EINVAL); | |
51 | ||
f5123211 ST |
52 | cancel_oldtype = LIBC_CANCEL_ASYNC(); |
53 | err = HURD_DPORT_USE_CANCEL (fd, __socket_accept (port, &new, &aport)); | |
54 | LIBC_CANCEL_RESET (cancel_oldtype); | |
55 | if (err) | |
eb43375f TS |
56 | return __hurd_dfail (fd, err); |
57 | ||
58 | if (addr != NULL) | |
59 | { | |
60 | buflen = *addr_len; | |
61 | err = __socket_whatis_address (aport, &type, &buf, &buflen); | |
62 | if (err == EOPNOTSUPP) | |
63 | /* If the protocol server can't tell us the address, just return a | |
64 | zero-length one. */ | |
65 | { | |
66 | buf = (char *)addr; | |
67 | buflen = 0; | |
68 | err = 0; | |
69 | } | |
70 | } | |
71 | __mach_port_deallocate (__mach_task_self (), aport); | |
72 | ||
73 | if (! err) | |
74 | { | |
75 | if (flags & O_NONBLOCK) | |
76 | err = __io_set_some_openmodes (new, O_NONBLOCK); | |
77 | /* TODO: do we need special ERR massaging after the previous call? */ | |
78 | } | |
79 | ||
80 | if (err) | |
81 | { | |
82 | __mach_port_deallocate (__mach_task_self (), new); | |
83 | return __hurd_dfail (fd, err); | |
84 | } | |
85 | ||
86 | if (addr != NULL) | |
87 | { | |
88 | if (*addr_len > buflen) | |
89 | *addr_len = buflen; | |
90 | ||
91 | if (buf != (char *) addr) | |
92 | { | |
93 | memcpy (addr, buf, *addr_len); | |
94 | __vm_deallocate (__mach_task_self (), (vm_address_t) buf, buflen); | |
95 | } | |
96 | ||
97 | if (buflen > 0) | |
98 | addr->sa_family = type; | |
99 | } | |
100 | ||
101 | return _hurd_intern_fd (new, O_IGNORE_CTTY | flags, 1); | |
102 | } | |
eb43375f | 103 | weak_alias (__libc_accept4, accept4) |