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/* Fetch the host's network interface list. Hurd version.
Copyright (C) 2002-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <ifreq.h>
#include <hurd.h>
#include <hurd/pfinet.h>
#include <sys/mman.h>
void
__ifreq (struct ifreq **ifreqs, int *num_ifs, int sockfd)
{
file_t server;
server = _hurd_socket_server (PF_INET, 0);
if (server == MACH_PORT_NULL)
{
out:
*num_ifs = 0;
*ifreqs = NULL;
}
else
{
char *data = NULL;
size_t len = 0;
error_t err = __pfinet_siocgifconf (server, -1, &data, &len);
if (err == MACH_SEND_INVALID_DEST || err == MIG_SERVER_DIED)
{
/* On the first use of the socket server during the operation,
allow for the old server port dying. */
server = _hurd_socket_server (PF_INET, 1);
if (server == MACH_PORT_NULL)
goto out;
err = __pfinet_siocgifconf (server, -1, (data_t *) ifreqs, &len);
}
if (err)
goto out;
if (len % sizeof (struct ifreq) != 0)
{
__munmap (data, len);
errno = EGRATUITOUS;
goto out;
}
*num_ifs = len / sizeof (struct ifreq);
*ifreqs = (struct ifreq *) data;
}
}
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