115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
/*
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device.c -- Interaction with FreeBSD tap device
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Copyright (C) 2001-2003 Ivo Timmermans <ivo@o2w.nl>,
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2001-2003 Guus Sliepen <guus@sliepen.eu.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: device.c,v 1.1.2.13 2003/07/22 20:55:21 guus Exp $
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*/
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#include "system.h"
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#include "conf.h"
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#include "logger.h"
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#include "net.h"
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#include "utils.h"
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#define DEFAULT_DEVICE "/dev/tap0"
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int device_fd = -1;
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char *device;
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char *iface;
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char *device_info;
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int device_total_in = 0;
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int device_total_out = 0;
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bool setup_device(void)
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{
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cp();
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if(!get_config_string(lookup_config(config_tree, "Device"), &device))
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device = DEFAULT_DEVICE;
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if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
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iface = rindex(device, '/') ? rindex(device, '/') + 1 : device;
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if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0) {
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logger(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno));
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return false;
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}
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device_info = _("FreeBSD tap device");
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logger(LOG_INFO, _("%s is a %s"), device, device_info);
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return true;
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}
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void close_device(void)
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{
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cp();
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close(device_fd);
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}
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bool read_packet(vpn_packet_t *packet)
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{
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int lenin;
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cp();
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if((lenin = read(device_fd, packet->data, MTU)) <= 0) {
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logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
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device, strerror(errno));
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return false;
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}
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packet->len = lenin;
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device_total_in += packet->len;
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ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"),
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packet->len, device_info);
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return true;
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}
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bool write_packet(vpn_packet_t *packet)
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{
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cp();
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ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
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packet->len, device_info);
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if(write(device_fd, packet->data, packet->len) < 0) {
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logger(LOG_ERR, _("Error while writing to %s %s: %s"), device_info,
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device, strerror(errno));
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return false;
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}
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device_total_out += packet->len;
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return true;
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}
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void dump_device_stats(void)
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{
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cp();
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logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
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logger(LOG_DEBUG, _(" total bytes in: %10d"), device_total_in);
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logger(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);
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}
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