75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
/* Fetch the host's network interface list. Hurd version.
|
|
Copyright (C) 2002 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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <net/if.h>
|
|
#include <hurd.h>
|
|
#include <hurd/pfinet.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/mman.h>
|
|
|
|
|
|
static inline void
|
|
__ifreq (struct ifreq **ifreqs, int *num_ifs, int sockfd)
|
|
{
|
|
struct ifconf ifc;
|
|
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, 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;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
static inline void
|
|
__if_freereq (struct ifreq *ifreqs, int num_ifs)
|
|
{
|
|
munmap (ifreqs, num_ifs * sizeof (struct ifreq))
|
|
}
|