| 1 | /* Fetch the host's network interface list. Hurd version. |
|---|
| 2 | Copyright (C) 2002-2022 Free Software Foundation, Inc. |
|---|
| 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 |
|---|
| 16 | License along with the GNU C Library; if not, see |
|---|
| 17 | <https://www.gnu.org/licenses/>. */ |
|---|
| 18 | |
|---|
| 19 | #include <ifreq.h> |
|---|
| 20 | #include <hurd.h> |
|---|
| 21 | #include <hurd/pfinet.h> |
|---|
| 22 | #include <sys/mman.h> |
|---|
| 23 | |
|---|
| 24 | |
|---|
| 25 | void |
|---|
| 26 | __ifreq (struct ifreq **ifreqs, int *num_ifs, int sockfd) |
|---|
| 27 | { |
|---|
| 28 | file_t server; |
|---|
| 29 | |
|---|
| 30 | server = _hurd_socket_server (PF_INET, 0); |
|---|
| 31 | if (server == MACH_PORT_NULL) |
|---|
| 32 | { |
|---|
| 33 | out: |
|---|
| 34 | *num_ifs = 0; |
|---|
| 35 | *ifreqs = NULL; |
|---|
| 36 | } |
|---|
| 37 | else |
|---|
| 38 | { |
|---|
| 39 | char *data = NULL; |
|---|
| 40 | size_t len = 0; |
|---|
| 41 | error_t err = __pfinet_siocgifconf (server, -1, &data, &len); |
|---|
| 42 | if (err == MACH_SEND_INVALID_DEST || err == MIG_SERVER_DIED) |
|---|
| 43 | { |
|---|
| 44 | /* On the first use of the socket server during the operation, |
|---|
| 45 | allow for the old server port dying. */ |
|---|
| 46 | server = _hurd_socket_server (PF_INET, 1); |
|---|
| 47 | if (server == MACH_PORT_NULL) |
|---|
| 48 | goto out; |
|---|
| 49 | err = __pfinet_siocgifconf (server, -1, (data_t *) ifreqs, &len); |
|---|
| 50 | } |
|---|
| 51 | if (err) |
|---|
| 52 | goto out; |
|---|
| 53 | |
|---|
| 54 | if (len % sizeof (struct ifreq) != 0) |
|---|
| 55 | { |
|---|
| 56 | __munmap (data, len); |
|---|
| 57 | errno = EGRATUITOUS; |
|---|
| 58 | goto out; |
|---|
| 59 | } |
|---|
| 60 | *num_ifs = len / sizeof (struct ifreq); |
|---|
| 61 | *ifreqs = (struct ifreq *) data; |
|---|
| 62 | } |
|---|
| 63 | |
|---|
| 64 | } |
|---|
| 65 | |
|---|
