Thu Oct 24 22:38:55 1996 Thomas Bushnell, n/BSG <thomas@gnu.ai.mit.edu>

	* main.c (main): Call setup_loopback_device before parsing args
	(and thus before the ethernet device shows up).
	* loopback.c: New file.
	* Makefile (SRCS): Add loopback.c.
	* pfinet.h (loopback_dev): New variable.

	* pfinet.h (ip_rt_del): New prototype.

1 files changed, 93 insertions, 0 deletions

diff --git a/pfinet/loopback.c b/pfinet/loopback.c
new file mode 100644
index 00000000..78cdfdf3
--- /dev/null
+++ b/pfinet/loopback.c
@@ -0,0 +1,93 @@
+/* Loopback "device" for pfinet
+   Copyright (C) 1996 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;
+}
+   
+
+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 = 0;
+  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;
+  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);
+}
+
+
+