2001-10-12 15:33:21 +00:00
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/*
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device.c -- Interaction with Solaris tun device
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2006-04-26 13:52:58 +00:00
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Copyright (C) 2001-2005 Ivo Timmermans,
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2011-05-08 19:22:20 +00:00
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2001-2011 Guus Sliepen <guus@tinc-vpn.org>
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2001-10-12 15:33:21 +00:00
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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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2009-09-24 22:01:00 +00:00
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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2001-10-12 15:33:21 +00:00
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*/
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2001-11-05 19:06:07 +00:00
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2003-07-18 13:41:37 +00:00
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#include "system.h"
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2001-11-05 19:06:07 +00:00
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2001-10-12 15:33:21 +00:00
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#include <sys/stropts.h>
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2001-11-05 19:06:07 +00:00
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#include <sys/sockio.h>
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2001-10-12 15:33:21 +00:00
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#include <net/if_tun.h>
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2001-11-05 19:06:07 +00:00
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#include "conf.h"
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2011-05-28 21:36:52 +00:00
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#include "device.h"
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2003-07-06 22:11:37 +00:00
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#include "logger.h"
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2003-07-18 13:41:37 +00:00
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#include "net.h"
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#include "utils.h"
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2009-01-03 21:06:10 +00:00
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#include "xalloc.h"
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2001-11-05 19:06:07 +00:00
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2003-07-18 13:41:37 +00:00
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#define DEFAULT_DEVICE "/dev/tun"
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2001-11-05 19:06:07 +00:00
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2001-10-12 15:33:21 +00:00
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int device_fd = -1;
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2011-12-04 00:20:59 +00:00
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static int ip_fd = -1, if_fd = -1;
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2001-11-05 19:06:07 +00:00
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char *device = NULL;
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2003-07-18 13:41:37 +00:00
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char *iface = NULL;
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2009-01-03 21:06:10 +00:00
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static char *device_info = NULL;
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2001-10-12 15:33:21 +00:00
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2010-06-04 13:04:08 +00:00
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static uint64_t device_total_in = 0;
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static uint64_t device_total_out = 0;
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2001-10-12 15:33:21 +00:00
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2011-12-04 00:20:59 +00:00
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static bool setup_device(void) {
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2002-09-09 21:25:28 +00:00
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int ppa;
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char *ptr;
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2002-09-10 21:29:42 +00:00
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if(!get_config_string(lookup_config(config_tree, "Device"), &device))
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2009-01-03 21:06:10 +00:00
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device = xstrdup(DEFAULT_DEVICE);
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2002-09-09 21:25:28 +00:00
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2002-09-10 21:29:42 +00:00
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if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Could not open %s: %s", device, strerror(errno));
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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2002-09-10 21:29:42 +00:00
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ppa = 0;
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2002-09-09 21:25:28 +00:00
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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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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Could not open /dev/ip: %s", strerror(errno));
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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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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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Can't assign new interface: %s", strerror(errno));
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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if((if_fd = open(device, O_RDWR, 0)) < 0) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Could not open %s twice: %s", device,
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2002-09-09 21:25:28 +00:00
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strerror(errno));
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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if(ioctl(if_fd, I_PUSH, "ip") < 0) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Can't push IP module: %s", strerror(errno));
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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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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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Can't set PPA %d: %s", ppa, strerror(errno));
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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if(ioctl(ip_fd, I_LINK, if_fd) < 0) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Can't link TUN device to IP: %s", strerror(errno));
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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2003-07-18 13:41:37 +00:00
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if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
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2009-09-08 16:18:36 +00:00
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xasprintf(&iface, "tun%d", ppa);
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2002-09-09 21:25:28 +00:00
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2009-09-24 22:54:07 +00:00
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device_info = "Solaris tun device";
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2002-09-09 21:25:28 +00:00
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2009-09-24 22:54:07 +00:00
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logger(LOG_INFO, "%s is a %s", device, device_info);
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2002-09-10 21:29:42 +00:00
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2003-07-22 20:55:21 +00:00
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return true;
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2001-10-12 15:33:21 +00:00
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}
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2011-12-04 00:20:59 +00:00
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static void close_device(void) {
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2011-01-02 15:50:24 +00:00
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close(if_fd);
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close(ip_fd);
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2002-09-10 21:29:42 +00:00
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close(device_fd);
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2009-01-09 11:36:06 +00:00
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free(device);
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free(iface);
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2001-11-05 19:06:07 +00:00
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}
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2011-12-04 00:20:59 +00:00
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static bool read_packet(vpn_packet_t *packet) {
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2002-09-09 21:25:28 +00:00
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int lenin;
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2002-09-10 21:29:42 +00:00
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if((lenin = read(device_fd, packet->data + 14, MTU - 14)) <= 0) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
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2002-09-09 21:25:28 +00:00
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device, strerror(errno));
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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2004-11-10 21:14:08 +00:00
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switch(packet->data[14] >> 4) {
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case 4:
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packet->data[12] = 0x08;
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packet->data[13] = 0x00;
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break;
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case 6:
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packet->data[12] = 0x86;
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packet->data[13] = 0xDD;
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break;
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default:
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ifdebug(TRAFFIC) logger(LOG_ERR,
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2009-10-03 11:06:00 +00:00
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"Unknown IP version %d while reading packet from %s %s",
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2004-11-10 21:14:08 +00:00
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packet->data[14] >> 4, device_info, device);
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return false;
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}
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2002-09-09 21:25:28 +00:00
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packet->len = lenin + 14;
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device_total_in += packet->len;
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2001-10-12 15:33:21 +00:00
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2009-09-24 22:54:07 +00:00
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ifdebug(TRAFFIC) logger(LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
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2002-09-09 21:25:28 +00:00
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device_info);
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2003-07-22 20:55:21 +00:00
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return true;
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2002-09-10 21:29:42 +00:00
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}
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2002-09-09 21:25:28 +00:00
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2011-12-04 00:20:59 +00:00
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static bool write_packet(vpn_packet_t *packet) {
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2009-09-24 22:54:07 +00:00
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ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s",
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2002-09-09 21:25:28 +00:00
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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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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Can't write to %s %s: %s", device_info,
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2003-07-31 11:20:32 +00:00
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device, strerror(errno));
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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device_total_out += packet->len;
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2002-09-10 21:29:42 +00:00
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2003-07-22 20:55:21 +00:00
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return true;
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2001-11-05 19:06:07 +00:00
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}
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2011-12-04 00:20:59 +00:00
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static void dump_device_stats(void) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_DEBUG, "Statistics for %s %s:", device_info, device);
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2010-06-04 13:04:08 +00:00
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logger(LOG_DEBUG, " total bytes in: %10"PRIu64, device_total_in);
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logger(LOG_DEBUG, " total bytes out: %10"PRIu64, device_total_out);
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2002-09-10 21:29:42 +00:00
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}
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2011-12-04 00:20:59 +00:00
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const devops_t os_devops = {
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.setup = setup_device,
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.close = close_device,
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.read = read_packet,
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.write = write_packet,
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.dump_stats = dump_device_stats,
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};
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