1 files changed, 93 insertions, 0 deletions
diff --git a/pfinet/pfinet-ops.c b/pfinet/pfinet-ops.c
new file mode 100644
index 00000000..594b5ac7
--- /dev/null
+++ b/pfinet/pfinet-ops.c
@@ -0,0 +1,93 @@
+/*
+   Copyright (C) 2000 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 this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA. */
+
+#include "pfinet.h"
+
+#include <linux/netdevice.h>
+#include <linux/notifier.h>
+
+#include "pfinet_S.h"
+#include <netinet/in.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+#include <mach/notify.h>
+#include <sys/mman.h>
+
+#include <sys/ioctl.h>
+#include <net/if.h>
+
+extern int dev_ifconf(char *arg);
+
+/* 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
+S_pfinet_siocgifconf (io_t port,
+		      int amount,
+		      char **ifr,
+		      mach_msg_type_number_t *len)
+{
+  error_t err = 0;
+  struct ifconf ifc;
+
+  __mutex_lock (&global_lock);
+  if (amount < 0)
+    {
+      /* Get the needed buffer length.  */
+      ifc.ifc_buf = NULL;
+      ifc.ifc_len = 0;
+      err = dev_ifconf ((char *) &ifc);
+      if (err)
+	{
+	  __mutex_unlock (&global_lock);
+	  return -err;
+	}
+      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;
+      err = dev_ifconf ((char *) &ifc);
+    }
+
+  if (err)
+    {
+      *len = 0;
+      if (ifc.ifc_buf != *ifr)
+	munmap (ifc.ifc_buf, amount);
+    }
+  else
+    {
+      *len = ifc.ifc_len;
+      *ifr = ifc.ifc_buf;
+    }
+
+  __mutex_unlock (&global_lock);
+  return err;
+}