/*
device.c -- Interaction with OpenBSD tun device
- Copyright (C) 2001 Ivo Timmermans <itimmermans@bigfoot.com>,
- 2001 Guus Sliepen <guus@sliepen.warande.net>
+ Copyright (C) 2001-2002 Ivo Timmermans <ivo@o2w.nl>,
+ 2001-2002 Guus Sliepen <guus@sliepen.eu.org>
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
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 $
+ $Id: device.c,v 1.1.2.9 2002/06/21 10:11:36 guus 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
int device_fd = -1;
int device_type;
-char *device_fname;
+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_fname)))
- device_fname = DEFAULT_DEVICE;
+ 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_fname, O_RDWR | O_NONBLOCK)) < 0)
+ if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0)
{
- syslog(LOG_ERR, _("Could not open %s: %m"), device_fname);
+ syslog(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno));
return -1;
}
cp
device_info = _("OpenBSD tun device");
- syslog(LOG_INFO, _("%s is a %s"), device_fname, device_info);
+ 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
- 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);
+ syslog(LOG_ERR, _("Error while reading from %s %s: %s"), device_info, device, strerror(errno));
return -1;
}
- packet->len = lenin - sizeof(type);
+ 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"), device_info, packet.len);
+ syslog(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len, device_info);
}
return 0;
int write_packet(vpn_packet_t *packet)
{
- u_int32_t type = htonl(AF_INET);
+ 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;
+ }
- struct iovec vector[2] = {{&type, sizeof(type)}, {packet->data, MTU}};
+ 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: %m"), device_info, packet.len);
+ 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
+}