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 <string.h> |
20 | #include <sys/socket.h> |
21 | |
22 | #include <hurd.h> |
23 | #include <hurd/fd.h> |
24 | #include <hurd/socket.h> |
25 | |
26 | /* Put the address of the peer connected to socket FD into *ADDR |
27 | (which is *LEN bytes long), and its actual length into *LEN. */ |
28 | int |
29 | __getpeername (int fd, __SOCKADDR_ARG addrarg, socklen_t *len) |
30 | { |
31 | error_t err; |
32 | mach_msg_type_number_t buflen = *len; |
33 | int type; |
34 | struct sockaddr *addr = addrarg.__sockaddr__; |
35 | char *buf = (char *) addr; |
36 | addr_port_t aport; |
37 | |
38 | if (err = HURD_DPORT_USE (fd, __socket_peername (port, &aport))) |
39 | return __hurd_dfail (fd, err); |
40 | |
41 | err = __socket_whatis_address (aport, &type, &buf, &buflen); |
42 | __mach_port_deallocate (__mach_task_self (), aport); |
43 | |
44 | if (err) |
45 | return __hurd_dfail (fd, err); |
46 | |
47 | if (*len > buflen) |
48 | *len = buflen; |
49 | |
50 | if (buf != (char *) addr) |
51 | { |
52 | memcpy (addr, buf, *len); |
53 | __vm_deallocate (__mach_task_self (), (vm_address_t) buf, buflen); |
54 | } |
55 | |
56 | const sa_family_t family = type; |
57 | if (*len > offsetof (struct sockaddr, sa_family)) |
58 | { |
59 | if (*len < (char *) (&addr->sa_family + 1) - (char *) addr) |
60 | memcpy (&addr->sa_family, &family, |
61 | *len - offsetof (struct sockaddr, sa_family)); |
62 | else |
63 | addr->sa_family = family; |
64 | } |
65 | |
66 | return 0; |
67 | } |
68 | |
69 | weak_alias (__getpeername, getpeername) |
70 | |