From: Guus Sliepen <guus@tinc-vpn.org>
Date: Fri, 12 Oct 2001 15:49:11 +0000 (+0000)
Subject: Added OpenBSD tun device handling. Untested though.
X-Git-Tag: release-1.0pre5~50
X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=commitdiff_plain;h=ad61c20f42d2bee5cc7976bec4370cf4747b42c3;hp=0c6321a67f92981d3adbaf4f5c2b9867c7968964

Added OpenBSD tun device handling. Untested though.
---

diff --git a/src/openbsd/device.c b/src/openbsd/device.c
new file mode 100644
index 00000000..badb459b
--- /dev/null
+++ b/src/openbsd/device.c
@@ -0,0 +1,113 @@
+/*
+    device.c -- Interaction with OpenBSD tun device
+    Copyright (C) 2001 Ivo Timmermans <itimmermans@bigfoot.com>,
+                  2001 Guus Sliepen <guus@sliepen.warande.net>
+
+    This program 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 of the License, or
+    (at your option) any later version.
+
+    This program 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+    $Id: device.c,v 1.1.2.1 2001/10/12 15:49:11 guus Exp $
+*/
+
+#define DEFAULT_DEVICE "/dev/tun0"
+
+#define DEVICE_TYPE_ETHERTAP 0
+#define DEVICE_TYPE_TUNTAP 1
+
+int device_fd = -1;
+int device_type;
+char *device_fname;
+char *device_info;
+
+int device_total_in = 0;
+int device_total_out = 0;
+
+/*
+  open the local ethertap device
+*/
+int setup_device(void)
+{
+  if(!get_config_string(lookup_config(config_tree, "Device"), &device_fname)))
+    device_fname = DEFAULT_DEVICE;
+
+cp
+  if((device_fd = open(device_fname, O_RDWR | O_NONBLOCK)) < 0)
+    {
+      syslog(LOG_ERR, _("Could not open %s: %m"), device_fname);
+      return -1;
+    }
+cp
+  /* Set default MAC address for ethertap devices */
+
+  mymac.type = SUBNET_MAC;
+  mymac.net.mac.address.x[0] = 0xfe;
+  mymac.net.mac.address.x[1] = 0xfd;
+  mymac.net.mac.address.x[2] = 0x00;
+  mymac.net.mac.address.x[3] = 0x00;
+  mymac.net.mac.address.x[4] = 0x00;
+  mymac.net.mac.address.x[5] = 0x00;
+
+  device_info = _("OpenBSD tun device");
+
+  syslog(LOG_INFO, _("%s is a %s"), device_fname, device_info);
+cp
+  return 0;
+}
+
+int read_packet(vpn_packet_t *packet)
+{
+  int lenin;
+  u_int32_t type;
+cp
+  struct iovec vector[2] = {{&type, sizeof(type)}, {packet->data, MTU}};
+
+  if((lenin = readv(device_fd, vector, 2)) <= 0)
+    {
+      syslog(LOG_ERR, _("Error while reading from %s %s: %m"), device_info, device_fname);
+      return -1;
+    }
+
+  packet->len = lenin - sizeof(type);
+
+  device_total_in += packet->len;
+
+  if(debug_lvl >= DEBUG_TRAFFIC)
+    {
+      syslog(LOG_DEBUG, _("Read packet of %d bytes from %s"), device_info, packet.len);
+    }
+
+  return 0;
+cp
+}
+
+int write_packet(vpn_packet_t *packet)
+{
+  u_int32_t type = htonl(AF_INET);
+cp
+  if(debug_lvl >= DEBUG_TRAFFIC)
+    syslog(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
+           packet->len, device_info);
+
+
+  struct iovec vector[2] = {{&type, sizeof(type)}, {packet->data, MTU}};
+
+  if(writev(device_fd, vector, 2) < 0)
+    {
+      syslog(LOG_ERR, _("Can't write to %s %s: %m"), device_info, packet.len);
+      return -1;
+    }
+
+  device_total_out += packet->len;
+cp
+}