+++ /dev/null
-/*
- device.c -- Interaction with OpenBSD tun device
- Copyright (C) 2001-2004 Ivo Timmermans <ivo@tinc-vpn.org>,
- 2001-2004 Guus Sliepen <guus@tinc-vpn.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
- 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.
-
- $Id$
-*/
-
-#include "system.h"
-#include <sys/uio.h>
-
-#include "conf.h"
-#include "logger.h"
-#include "net.h"
-#include "utils.h"
-
-#define DEFAULT_DEVICE "/dev/tun0"
-
-int device_fd = -1;
-char *device;
-char *iface;
-char *device_info;
-
-static int device_total_in = 0;
-static int device_total_out = 0;
-
-bool setup_device(void)
-{
- cp();
-
- if(!get_config_string(lookup_config(config_tree, "Device"), &device))
- device = DEFAULT_DEVICE;
-
- if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
- iface = rindex(device, '/') ? rindex(device, '/') + 1 : device;
- if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0) {
- logger(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno));
- return false;
- }
-
- device_info = _("OpenBSD tun device");
-
- logger(LOG_INFO, _("%s is a %s"), device, device_info);
-
- return true;
-}
-
-void close_device(void)
-{
- cp();
-
- close(device_fd);
-}
-
-bool 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) {
- logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
- device, strerror(errno));
- return false;
- }
-
- 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:
- ifdebug(TRAFFIC) logger(LOG_ERR,
- _ ("Unknown address family %d while reading packet from %s %s"),
- ntohl(type), device_info, device);
- return false;
- }
-
- packet->len = lenin + 10;
-
- device_total_in += packet->len;
-
- ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len,
- device_info);
-
- return true;
-}
-
-bool write_packet(vpn_packet_t *packet)
-{
- u_int32_t type;
- struct iovec vector[2];
- int af;
-
- cp();
-
- ifdebug(TRAFFIC) logger(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:
- ifdebug(TRAFFIC) logger(LOG_ERR,
- _("Unknown address family %d while writing packet to %s %s"),
- af, device_info, device);
- return false;
- }
-
- 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) {
- logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device,
- strerror(errno));
- return false;
- }
-
- device_total_out += packet->len;
-
- return true;
-}
-
-void dump_device_stats(void)
-{
- cp();
-
- logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
- logger(LOG_DEBUG, _(" total bytes in: %10d"), device_total_in);
- logger(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);
-}