X-Git-Url: https://tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fopenbsd%2Fdevice.c;fp=src%2Fopenbsd%2Fdevice.c;h=7f20a95067cf717669c6fb902ecff773db8d00d7;hb=86dc60b9808d3aac70eccda80607a91ffd2e5292;hp=0000000000000000000000000000000000000000;hpb=af23dfa5efb82b35eb00b94bda56390c9e2aac6f;p=tinc

diff --git a/src/openbsd/device.c b/src/openbsd/device.c
new file mode 100644
index 00000000..7f20a950
--- /dev/null
+++ b/src/openbsd/device.c
@@ -0,0 +1,195 @@
+/*
+    device.c -- Interaction with OpenBSD tun device
+    Copyright (C) 2001-2002 Ivo Timmermans <itimmermans@bigfoot.com>,
+                  2001-2002 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 1.2 2002/04/09 15:32:14 zarq Exp $
+*/
+
+#include "config.h"
+
+#include <stdio.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <fcntl.h>
+#include <net/if.h>
+#include <unistd.h>
+#include <syslog.h>
+#include <string.h>
+
+#include <utils.h>
+#include "conf.h"
+#include "net.h"
+#include "subnet.h"
+
+#include "system.h"
+
+#define DEFAULT_DEVICE "/dev/tun0"
+
+#define DEVICE_TYPE_ETHERTAP 0
+#define DEVICE_TYPE_TUNTAP 1
+
+int device_fd = -1;
+int device_type;
+char *device;
+char *interface;
+char *device_info;
+
+int device_total_in = 0;
+int device_total_out = 0;
+
+extern subnet_t mymac;
+
+/*
+  open the local ethertap device
+*/
+int setup_device(void)
+{
+  if(!get_config_string(lookup_config(config_tree, "Device"), &device))
+    device = DEFAULT_DEVICE;
+
+  if(!get_config_string(lookup_config(config_tree, "Interface"), &interface))
+    interface = rindex(device, '/')?rindex(device, '/')+1:device;
+cp
+  if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0)
+    {
+      syslog(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno));
+      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, device_info);
+cp
+  return 0;
+}
+
+void close_device(void)
+{
+cp
+  close(device_fd);
+cp
+}
+
+int read_packet(vpn_packet_t *packet)
+{
+  int lenin;
+  u_int32_t type;
+  struct iovec vector[2] = {{&type, sizeof(type)}, {packet->data + 14, MTU - 14}};
+cp
+
+  if((lenin = readv(device_fd, vector, 2)) <= 0)
+    {
+      syslog(LOG_ERR, _("Error while reading from %s %s: %s"), device_info, device, strerror(errno));
+      return -1;
+    }
+
+  memcpy(packet->data, mymac.net.mac.address.x, 6);
+  memcpy(packet->data + 6, mymac.net.mac.address.x, 6);
+
+  switch(ntohl(type))
+    {
+      case AF_INET:
+        packet->data[12] = 0x8;
+	packet->data[13] = 0x0;
+	break;
+      case AF_INET6:
+        packet->data[12] = 0x86;
+	packet->data[13] = 0xDD;
+	break;
+      default:
+        if(debug_lvl >= DEBUG_TRAFFIC)
+	  syslog(LOG_ERR, _("Unknown address family %d while reading packet from %s %s"), ntohl(type), device_info, device);
+	return -1;
+    }
+
+  packet->len = lenin + 10;
+
+  device_total_in += packet->len;
+
+  if(debug_lvl >= DEBUG_TRAFFIC)
+    {
+      syslog(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len, device_info);
+    }
+
+  return 0;
+cp
+}
+
+int write_packet(vpn_packet_t *packet)
+{
+  u_int32_t type;
+  struct iovec vector[2];
+  int af;
+cp
+  if(debug_lvl >= DEBUG_TRAFFIC)
+    syslog(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
+           packet->len, device_info);
+
+  af = (packet->data[12] << 8) + packet->data[13];
+
+  switch(af)
+    {
+      case 0x800:
+        type = htonl(AF_INET);
+	break;
+      case 0x86DD:
+        type = htonl(AF_INET6);
+	break;
+      default:
+        if(debug_lvl >= DEBUG_TRAFFIC)
+	  syslog(LOG_ERR, _("Unknown address family %d while writing packet to %s %s"), af, device_info, device);
+	return -1;
+    }
+
+  vector[0].iov_base = &type;
+  vector[0].iov_len = sizeof(type);
+  vector[1].iov_base = packet->data + 14;
+  vector[1].iov_len = packet->len - 14;
+
+  if(writev(device_fd, vector, 2) < 0)
+    {
+      syslog(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device, strerror(errno));
+      return -1;
+    }
+
+  device_total_out += packet->len;
+cp
+}
+
+void dump_device_stats(void)
+{
+cp
+  syslog(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
+  syslog(LOG_DEBUG, _(" total bytes in:  %10d"), device_total_in);
+  syslog(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);
+cp
+}