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Added OpenBSD tun device handling. Untested though.

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This commit is contained in:
Guus Sliepen 2001-10-12 15:49:11 +00:00
parent 0c6321a67f
commit ad61c20f42
1 changed files with 113 additions and 0 deletions
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src/openbsd/device.c Normal file
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/*
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;
}
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/* 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);
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return 0;
}
int read_packet(vpn_packet_t *packet)
{
int lenin;
u_int32_t type;
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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;
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}
int write_packet(vpn_packet_t *packet)
{
u_int32_t type = htonl(AF_INET);
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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;
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}