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/*
Copyright (C) 2000,02,17 Free Software Foundation, Inc.
Written by Marcus Brinkmann.
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
The GNU Hurd 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with the GNU Hurd. If not, see <http://www.gnu.org/licenses/>.
*/
/* Operations offered by the stack */
#include <lwip_pfinet_S.h>
#include <string.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <lwip/netif.h>
#include <lwip/sockets.h>
#include <lwip/inet.h>
#include <sys/mman.h>
#include <lwip-util.h>
#include <netif/hurdethif.h>
/*
* Get all the data requested by SIOCGIFCONF for a particular interface.
*
* When ifc->ifc_ifreq == NULL, this function is being called for getting
* the needed buffer length and not the actual data.
*/
static void
dev_ifconf (struct ifconf *ifc)
{
struct netif *netif;
struct ifreq *ifr;
struct sockaddr_in *saddr;
int len;
ifr = ifc->ifc_req;
len = ifc->ifc_len;
saddr = (struct sockaddr_in *) &ifr->ifr_addr;
for (netif = netif_list; netif != 0; netif = netif->next)
{
if (ifc->ifc_req != 0)
{
/* Get the data */
if (len < (int) sizeof (struct ifreq))
break;
memset (ifr, 0, sizeof (struct ifreq));
strncpy (ifr->ifr_name, netif_get_state (netif)->devname,
sizeof (ifr->ifr_name)-1);
saddr->sin_len = sizeof (struct sockaddr_in);
saddr->sin_family = AF_INET;
saddr->sin_addr.s_addr = netif_ip4_addr (netif)->addr;
len -= sizeof (struct ifreq);
}
/* Update the needed buffer length */
ifr++;
}
ifc->ifc_len = (uintptr_t) ifr - (uintptr_t) ifc->ifc_req;
}
/* Return the list of devices in the format provided by SIOCGIFCONF
in IFR, but don't return more then AMOUNT bytes. If AMOUNT is
negative, there is no limit. */
error_t
lwip_S_pfinet_siocgifconf (io_t port,
vm_size_t amount,
char **ifr, mach_msg_type_number_t * len)
{
struct ifconf ifc;
if (amount == (vm_size_t) - 1)
{
/* Get the needed buffer length */
ifc.ifc_buf = 0;
ifc.ifc_len = 0;
dev_ifconf (&ifc);
amount = ifc.ifc_len;
}
else
ifc.ifc_len = amount;
if (amount > 0)
{
/* Possibly allocate a new buffer */
if (*len < amount)
ifc.ifc_buf = (char *) mmap (0, amount, PROT_READ | PROT_WRITE,
MAP_ANON, 0, 0);
else
ifc.ifc_buf = *ifr;
dev_ifconf (&ifc);
}
*len = ifc.ifc_len;
*ifr = ifc.ifc_buf;
return 0;
}
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