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/* Find network interface names and index numbers. Hurd version.
Copyright (C) 2000 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. 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/fsys.h>
#include <string.h>
#include <sys/mman.h>
static int
map_interfaces (int domain,
unsigned int *idxp,
int (*counted_initializer) (unsigned int count,
size_t nameslen),
int (*iterator) (const char *))
{
static const char ifopt[] = "--interface=";
file_t server;
char optsbuf[512], *opts = optsbuf, *p;
size_t optslen = sizeof optsbuf;
error_t err;
/* Find the socket server for DOMAIN. */
server = _hurd_socket_server (domain, 0);
if (server == MACH_PORT_NULL)
return 0;
err = __file_get_fs_options (server, &opts, &optslen);
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 (domain, 1);
if (server == MACH_PORT_NULL)
return -1;
err = __file_get_fs_options (server, &opts, &optslen);
}
if (err)
return __hurd_fail (err), 0;
if (counted_initializer)
{
unsigned int count = 0;
size_t nameslen = 0;
p = memchr (opts, '\0', optslen);
while (p != 0)
{
char *end = memchr (p + 1, '\0', optslen - (p - opts));
if (end == 0)
break;
if (optslen - (p - opts) >= sizeof ifopt
&& !memcmp (p + 1, ifopt, sizeof ifopt - 1))
{
size_t len = end + 1 - (p + sizeof ifopt);
nameslen += len > IFNAMSIZ+1 ? IFNAMSIZ+1 : len;
++count;
}
p = end;
}
if ((*counted_initializer) (count, nameslen))
return 0;
}
*idxp = 0;
for (p = memchr (opts, '\0', optslen); p != 0;
p = memchr (p + 1, '\0', optslen - (p - opts)))
{
++*idxp;
if (optslen - (p - opts) >= sizeof ifopt
&& !memcmp (p + 1, ifopt, sizeof ifopt - 1)
&& (*iterator) (p + sizeof ifopt))
break;
}
if (opts != optsbuf)
__munmap (opts, optslen);
return 1;
}
unsigned int
if_nametoindex (const char *ifname)
{
unsigned int idx;
int find_name (const char *name)
{
return !strcmp (name, ifname);
}
return map_interfaces (PF_INET, &idx, 0, &find_name) ? idx : 0;
}
char *
if_indextoname (unsigned int ifindex, char *ifname)
{
unsigned int idx;
int find_idx (const char *name)
{
if (idx == ifindex)
{
strncpy (ifname, name, IFNAMSIZ);
return 1;
}
return 0;
}
return map_interfaces (PF_INET, &idx, 0, &find_idx) ? ifname : NULL;
}
struct if_nameindex *
if_nameindex (void)
{
unsigned int idx;
struct if_nameindex *buf;
char *namep;
int alloc (unsigned int count, size_t nameslen)
{
buf = malloc ((sizeof buf[0] * (count + 1)) + nameslen);
if (buf == 0)
return 1;
buf[count].if_index = 0;
buf[count].if_name = NULL;
namep = (char *) &buf[count + 1];
return 0;
}
int fill (const char *name)
{
buf[idx - 1].if_index = idx;
buf[idx - 1].if_name = namep;
namep = __memccpy (namep, name, '\0', IFNAMSIZ+1) ?: &namep[IFNAMSIZ+1];
return 0;
}
return map_interfaces (PF_INET, &idx, &alloc, &fill) ? buf : NULL;
}
void
if_freenameindex (struct if_nameindex *ifn)
{
free (ifn);
}
#if 0
void
internal_function
__protocol_available (int *have_inet, int *have_inet6)
{
*have_inet = _hurd_socket_server (PF_INET, 0) != MACH_PORT_NULL;
*have_inet6 = _hurd_socket_server (PF_INET6, 0) != MACH_PORT_NULL;
}
#endif
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