1 | /* Copyright (C) 1994-2022 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 <string.h> |
24 | #include <sysdep-cancel.h> |
25 | |
26 | /* Read N bytes into BUF from socket FD. |
27 | Returns the number read or -1 for errors. */ |
28 | |
29 | ssize_t |
30 | __recv (int fd, void *buf, size_t n, int flags) |
31 | { |
32 | error_t err; |
33 | mach_port_t addrport; |
34 | char *bufp = buf; |
35 | mach_msg_type_number_t nread = n; |
36 | mach_port_t *ports; |
37 | mach_msg_type_number_t nports = 0; |
38 | char *cdata = NULL; |
39 | mach_msg_type_number_t clen = 0; |
40 | int cancel_oldtype; |
41 | |
42 | cancel_oldtype = LIBC_CANCEL_ASYNC(); |
43 | err = HURD_DPORT_USE_CANCEL (fd, __socket_recv (port, &addrport, |
44 | flags, &bufp, &nread, |
45 | &ports, &nports, |
46 | &cdata, &clen, |
47 | &flags, |
48 | n)); |
49 | LIBC_CANCEL_RESET (cancel_oldtype); |
50 | |
51 | if (err == MIG_BAD_ID || err == EOPNOTSUPP) |
52 | /* The file did not grok the socket protocol. */ |
53 | err = ENOTSOCK; |
54 | if (err) |
55 | return __hurd_sockfail (fd, flags, err); |
56 | |
57 | __mach_port_deallocate (__mach_task_self (), addrport); |
58 | __vm_deallocate (__mach_task_self (), (vm_address_t) cdata, clen); |
59 | |
60 | if (bufp != buf) |
61 | { |
62 | memcpy (buf, bufp, nread); |
63 | __vm_deallocate (__mach_task_self (), (vm_address_t) bufp, nread); |
64 | } |
65 | |
66 | return nread; |
67 | } |
68 | libc_hidden_def (__recv) |
69 | weak_alias (__recv, recv) |
70 | |