169 lines
4 KiB
C
169 lines
4 KiB
C
/*
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device.c -- Interaction with Solaris tun 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 1.1.2.16 2003/07/22 20:55:21 guus Exp $
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*/
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#include "system.h"
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#include <sys/stropts.h>
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#include <sys/sockio.h>
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#include <net/if_tun.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/tun"
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int device_fd = -1;
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char *device = NULL;
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char *iface = NULL;
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char ifrname[IFNAMSIZ];
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char *device_info = NULL;
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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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int ip_fd = -1, if_fd = -1;
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int ppa;
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char *ptr;
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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((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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ppa = 0;
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ptr = device;
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while(*ptr && !isdigit((int) *ptr))
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ptr++;
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ppa = atoi(ptr);
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if((ip_fd = open("/dev/ip", O_RDWR, 0)) < 0) {
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logger(LOG_ERR, _("Could not open /dev/ip: %s"), strerror(errno));
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return false;
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}
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/* Assign a new PPA and get its unit number. */
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if((ppa = ioctl(device_fd, TUNNEWPPA, ppa)) < 0) {
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logger(LOG_ERR, _("Can't assign new interface: %s"), strerror(errno));
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return false;
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}
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if((if_fd = open(device, O_RDWR, 0)) < 0) {
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logger(LOG_ERR, _("Could not open %s twice: %s"), device,
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strerror(errno));
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return false;
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}
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if(ioctl(if_fd, I_PUSH, "ip") < 0) {
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logger(LOG_ERR, _("Can't push IP module: %s"), strerror(errno));
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return false;
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}
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/* Assign ppa according to the unit number returned by tun device */
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if(ioctl(if_fd, IF_UNITSEL, (char *) &ppa) < 0) {
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logger(LOG_ERR, _("Can't set PPA %d: %s"), ppa, strerror(errno));
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return false;
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}
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if(ioctl(ip_fd, I_LINK, if_fd) < 0) {
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logger(LOG_ERR, _("Can't link TUN device to IP: %s"), strerror(errno));
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return false;
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}
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if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
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asprintf(&iface, "tun%d", ppa);
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device_info = _("Solaris tun 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 + 14, MTU - 14)) <= 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->data[12] = 0x08;
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packet->data[13] = 0x00;
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packet->len = lenin + 14;
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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"), packet->len,
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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 + 14, packet->len - 14) < 0) {
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logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, packet->len,
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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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