tinc/src/solaris/device.c
2003-07-22 20:55:21 +00:00

169 lines
4 KiB
C

/*
device.c -- Interaction with Solaris tun device
Copyright (C) 2001-2003 Ivo Timmermans <ivo@o2w.nl>,
2001-2003 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
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 1.1.2.16 2003/07/22 20:55:21 guus Exp $
*/
#include "system.h"
#include <sys/stropts.h>
#include <sys/sockio.h>
#include <net/if_tun.h>
#include "conf.h"
#include "logger.h"
#include "net.h"
#include "utils.h"
#define DEFAULT_DEVICE "/dev/tun"
int device_fd = -1;
char *device = NULL;
char *iface = NULL;
char ifrname[IFNAMSIZ];
char *device_info = NULL;
int device_total_in = 0;
int device_total_out = 0;
bool setup_device(void)
{
int ip_fd = -1, if_fd = -1;
int ppa;
char *ptr;
cp();
if(!get_config_string(lookup_config(config_tree, "Device"), &device))
device = DEFAULT_DEVICE;
if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0) {
logger(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno));
return false;
}
ppa = 0;
ptr = device;
while(*ptr && !isdigit((int) *ptr))
ptr++;
ppa = atoi(ptr);
if((ip_fd = open("/dev/ip", O_RDWR, 0)) < 0) {
logger(LOG_ERR, _("Could not open /dev/ip: %s"), strerror(errno));
return false;
}
/* Assign a new PPA and get its unit number. */
if((ppa = ioctl(device_fd, TUNNEWPPA, ppa)) < 0) {
logger(LOG_ERR, _("Can't assign new interface: %s"), strerror(errno));
return false;
}
if((if_fd = open(device, O_RDWR, 0)) < 0) {
logger(LOG_ERR, _("Could not open %s twice: %s"), device,
strerror(errno));
return false;
}
if(ioctl(if_fd, I_PUSH, "ip") < 0) {
logger(LOG_ERR, _("Can't push IP module: %s"), strerror(errno));
return false;
}
/* Assign ppa according to the unit number returned by tun device */
if(ioctl(if_fd, IF_UNITSEL, (char *) &ppa) < 0) {
logger(LOG_ERR, _("Can't set PPA %d: %s"), ppa, strerror(errno));
return false;
}
if(ioctl(ip_fd, I_LINK, if_fd) < 0) {
logger(LOG_ERR, _("Can't link TUN device to IP: %s"), strerror(errno));
return false;
}
if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
asprintf(&iface, "tun%d", ppa);
device_info = _("Solaris 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;
cp();
if((lenin = read(device_fd, packet->data + 14, MTU - 14)) <= 0) {
logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
device, strerror(errno));
return false;
}
packet->data[12] = 0x08;
packet->data[13] = 0x00;
packet->len = lenin + 14;
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)
{
cp();
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
packet->len, device_info);
if(write(device_fd, packet->data + 14, packet->len - 14) < 0) {
logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, packet->len,
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);
}