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/* Loopback "device" for pfinet
Copyright (C) 1996, 1998 Free Software Foundation, Inc.
Written by Thomas Bushnell, n/BSG.
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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include <linux/netdevice.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "pfinet.h"
struct device loopback_dev;
int
loopback_xmit (struct sk_buff *skb, struct device *dev)
{
int done;
if (!skb || !dev)
return 0;
if (dev->tbusy)
return 1;
dev->tbusy;
done = dev_rint (skb->data, skb->len, 0, dev);
dev_kfree_skb (skb, FREE_WRITE);
while (done != 1)
done = dev_rint (0, 0, 0, dev);
dev->tbusy = 0;
return 0;
}
u_int16_t
loopback_type_trans (struct sk_buff *skb, struct device *dev)
{
return htons (ETH_P_IP);
}
void
setup_loopback_device (char *name)
{
int i;
loopback_dev.name = name;
for (i = 0; i < DEV_NUMBUFFS; i++)
skb_queue_head_init (&loopback_dev.buffs[i]);
loopback_dev.open = 0;
loopback_dev.stop = 0;
loopback_dev.hard_start_xmit = loopback_xmit;
loopback_dev.hard_header = 0;
loopback_dev.rebuild_header = 0;
loopback_dev.type_trans = loopback_type_trans;
loopback_dev.get_stats = 0;
loopback_dev.set_multicast_list = 0;
loopback_dev.type = 0;
loopback_dev.addr_len = 0;
loopback_dev.flags = IFF_LOOPBACK | IFF_BROADCAST | IFF_UP;
loopback_dev.family = AF_INET;
loopback_dev.mtu = 2000;
/* Defaults */
loopback_dev.pa_addr = inet_addr ("127.0.0.1");
loopback_dev.pa_brdaddr = inet_addr ("127.255.255.255");
loopback_dev.pa_mask = inet_addr ("255.0.0.0");
loopback_dev.pa_alen = sizeof (unsigned long);
loopback_dev.next = dev_base;
dev_base = &loopback_dev;
/* Add the route */
ip_rt_add (RTF_HOST, loopback_dev.pa_addr, 0xffffffff, 0, &loopback_dev,
loopback_dev.mtu, 0);
}
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