/*
device.c -- Interaction BSD tun/tap device
Copyright (C) 2001-2005 Ivo Timmermans,
- 2001-2009 Guus Sliepen <guus@tinc-vpn.org>
+ 2001-2016 Guus Sliepen <guus@tinc-vpn.org>
+ 2009 Grzegorz Dymarek <gregd72002@googlemail.com>
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
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.
+ 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.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#include "system.h"
+#include "../system.h"
-#include "conf.h"
-#include "logger.h"
-#include "net.h"
-#include "route.h"
-#include "utils.h"
-#include "xalloc.h"
+#include "../conf.h"
+#include "../device.h"
+#include "../logger.h"
+#include "../net.h"
+#include "../route.h"
+#include "../utils.h"
+#include "../xalloc.h"
-#ifdef HAVE_TUNEMU
-#include "bsd/tunemu.h"
+#ifdef ENABLE_TUNEMU
+#include "tunemu.h"
#endif
-#define DEFAULT_DEVICE "/dev/tun0"
+#define DEFAULT_TUN_DEVICE "/dev/tun0"
+#define DEFAULT_TAP_DEVICE "/dev/tap0"
typedef enum device_type {
DEVICE_TYPE_TUN,
DEVICE_TYPE_TUNIFHEAD,
DEVICE_TYPE_TAP,
-#ifdef HAVE_TUNEMU
+#ifdef ENABLE_TUNEMU
DEVICE_TYPE_TUNEMU,
#endif
} device_type_t;
char *device = NULL;
char *iface = NULL;
static char *device_info = NULL;
-static int device_total_in = 0;
-static int device_total_out = 0;
-#if defined(TUNEMU)
+static uint64_t device_total_in = 0;
+static uint64_t device_total_out = 0;
+#if defined(ENABLE_TUNEMU)
static device_type_t device_type = DEVICE_TYPE_TUNEMU;
-#elif defined(HAVE_OPENBSD) || defined(HAVE_FREEBSD)
+#elif defined(HAVE_OPENBSD) || defined(HAVE_FREEBSD) || defined(HAVE_DRAGONFLY)
static device_type_t device_type = DEVICE_TYPE_TUNIFHEAD;
#else
static device_type_t device_type = DEVICE_TYPE_TUN;
#endif
-bool setup_device(void) {
- char *type;
+static bool setup_device(void) {
+ // Find out which device file to open
- cp();
+ if(!get_config_string(lookup_config(config_tree, "Device"), &device)) {
+ if(routing_mode == RMODE_ROUTER)
+ device = xstrdup(DEFAULT_TUN_DEVICE);
+ else
+ device = xstrdup(DEFAULT_TAP_DEVICE);
+ }
- if(!get_config_string(lookup_config(config_tree, "Device"), &device))
- device = xstrdup(DEFAULT_DEVICE);
+ // Find out if it's supposed to be a tun or a tap device
- if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
- iface = xstrdup(rindex(device, '/') ? rindex(device, '/') + 1 : device);
+ char *type;
if(get_config_string(lookup_config(config_tree, "DeviceType"), &type)) {
if(!strcasecmp(type, "tun"))
/* use default */;
-#ifdef HAVE_TUNEMU
+#ifdef ENABLE_TUNEMU
else if(!strcasecmp(type, "tunemu"))
device_type = DEVICE_TYPE_TUNEMU;
#endif
else if(!strcasecmp(type, "tap"))
device_type = DEVICE_TYPE_TAP;
else {
- logger(LOG_ERR, _("Unknown device type %s!"), type);
+ logger(LOG_ERR, "Unknown device type %s!", type);
return false;
}
} else {
device_type = DEVICE_TYPE_TAP;
}
+ // Open the device
+
switch(device_type) {
-#ifdef HAVE_TUNEMU
+#ifdef ENABLE_TUNEMU
case DEVICE_TYPE_TUNEMU: {
char dynamic_name[256] = "";
device_fd = tunemu_open(dynamic_name);
}
if(device_fd < 0) {
- logger(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno));
+ logger(LOG_ERR, "Could not open %s: %s", device, strerror(errno));
return false;
}
+#ifdef FD_CLOEXEC
+ fcntl(device_fd, F_SETFD, FD_CLOEXEC);
+#endif
+
+ // Guess what the corresponding interface is called
+
+ char *realname;
+
+#if defined(HAVE_FDEVNAME)
+ realname = fdevname(device_fd) ? : device;
+#elif defined(HAVE_DEVNAME)
+ struct stat buf;
+ if(!fstat(device_fd, &buf))
+ realname = devname(buf.st_rdev, S_IFCHR) ? : device;
+#else
+ realname = device;
+#endif
+
+ if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
+ iface = xstrdup(strrchr(realname, '/') ? strrchr(realname, '/') + 1 : realname);
+ else if(strcmp(iface, strrchr(realname, '/') ? strrchr(realname, '/') + 1 : realname))
+ logger(LOG_WARNING, "Warning: Interface does not match Device. $INTERFACE might be set incorrectly.");
+
+ // Configure the device as best as we can
+
switch(device_type) {
default:
device_type = DEVICE_TYPE_TUN;
{
const int zero = 0;
if(ioctl(device_fd, TUNSIFHEAD, &zero, sizeof zero) == -1) {
- logger(LOG_ERR, _("System call `%s' failed: %s"), "ioctl", strerror(errno));
+ logger(LOG_ERR, "System call `%s' failed: %s", "ioctl", strerror(errno));
return false;
}
}
}
#endif
- device_info = _("Generic BSD tun device");
+ device_info = "Generic BSD tun device";
break;
case DEVICE_TYPE_TUNIFHEAD:
#ifdef TUNSIFHEAD
{
const int one = 1;
if(ioctl(device_fd, TUNSIFHEAD, &one, sizeof one) == -1) {
- logger(LOG_ERR, _("System call `%s' failed: %s"), "ioctl", strerror(errno));
+ logger(LOG_ERR, "System call `%s' failed: %s", "ioctl", strerror(errno));
return false;
}
}
}
#endif
- device_info = _("Generic BSD tun device");
+ device_info = "Generic BSD tun device";
break;
case DEVICE_TYPE_TAP:
if(routing_mode == RMODE_ROUTER)
overwrite_mac = true;
- device_info = _("Generic BSD tap device");
+ device_info = "Generic BSD tap device";
+#ifdef TAPGIFNAME
+ {
+ struct ifreq ifr;
+ if(ioctl(device_fd, TAPGIFNAME, (void*)&ifr) == 0) {
+ if(iface)
+ free(iface);
+ iface = xstrdup(ifr.ifr_name);
+ }
+ }
+
+#endif
break;
-#ifdef HAVE_TUNEMU
+#ifdef ENABLE_TUNEMU
case DEVICE_TYPE_TUNEMU:
- device_info = _("BSD tunemu device");
+ device_info = "BSD tunemu device";
break;
#endif
}
- logger(LOG_INFO, _("%s is a %s"), device, device_info);
+ logger(LOG_INFO, "%s is a %s", device, device_info);
return true;
}
-void close_device(void) {
- cp();
-
+static void close_device(void) {
switch(device_type) {
-#ifdef HAVE_TUNEMU
+#ifdef ENABLE_TUNEMU
case DEVICE_TYPE_TUNEMU:
tunemu_close(device_fd);
break;
free(iface);
}
-bool read_packet(vpn_packet_t *packet) {
+static bool read_packet(vpn_packet_t *packet) {
int lenin;
- cp();
-
switch(device_type) {
case DEVICE_TYPE_TUN:
-#ifdef HAVE_TUNEMU
+#ifdef ENABLE_TUNEMU
case DEVICE_TYPE_TUNEMU:
if(device_type == DEVICE_TYPE_TUNEMU)
lenin = tunemu_read(device_fd, packet->data + 14, MTU - 14);
else
-#else
- lenin = read(device_fd, packet->data + 14, MTU - 14);
#endif
+ lenin = read(device_fd, packet->data + 14, MTU - 14);
if(lenin <= 0) {
- logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
+ logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
device, strerror(errno));
return false;
}
break;
default:
ifdebug(TRAFFIC) logger(LOG_ERR,
- _ ("Unknown IP version %d while reading packet from %s %s"),
+ "Unknown IP version %d while reading packet from %s %s",
packet->data[14] >> 4, device_info, device);
return false;
}
+ memset(packet->data, 0, 12);
packet->len = lenin + 14;
break;
struct iovec vector[2] = {{&type, sizeof(type)}, {packet->data + 14, MTU - 14}};
if((lenin = readv(device_fd, vector, 2)) <= 0) {
- logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
+ logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
device, strerror(errno));
return false;
}
default:
ifdebug(TRAFFIC) logger(LOG_ERR,
- _ ("Unknown address family %x while reading packet from %s %s"),
+ "Unknown address family %x while reading packet from %s %s",
ntohl(type), device_info, device);
return false;
}
+ memset(packet->data, 0, 12);
packet->len = lenin + 10;
break;
}
case DEVICE_TYPE_TAP:
if((lenin = read(device_fd, packet->data, MTU)) <= 0) {
- logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
+ logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
device, strerror(errno));
return false;
}
device_total_in += packet->len;
- ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"),
+ ifdebug(TRAFFIC) logger(LOG_DEBUG, "Read packet of %d bytes from %s",
packet->len, device_info);
- logger(LOG_INFO, "E:fd_read");
return true;
}
-bool write_packet(vpn_packet_t *packet)
-{
- cp();
-
- ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
+static bool write_packet(vpn_packet_t *packet) {
+ ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s",
packet->len, device_info);
switch(device_type) {
case DEVICE_TYPE_TUN:
if(write(device_fd, packet->data + 14, packet->len - 14) < 0) {
- logger(LOG_ERR, _("Error while writing to %s %s: %s"), device_info,
+ logger(LOG_ERR, "Error while writing to %s %s: %s", device_info,
device, strerror(errno));
return false;
}
break;
default:
ifdebug(TRAFFIC) logger(LOG_ERR,
- _("Unknown address family %x while writing packet to %s %s"),
+ "Unknown address family %x while writing packet to %s %s",
af, device_info, device);
return false;
}
if(writev(device_fd, vector, 2) < 0) {
- logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device,
+ logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device,
strerror(errno));
return false;
}
case DEVICE_TYPE_TAP:
if(write(device_fd, packet->data, packet->len) < 0) {
- logger(LOG_ERR, _("Error while writing to %s %s: %s"), device_info,
+ logger(LOG_ERR, "Error while writing to %s %s: %s", device_info,
device, strerror(errno));
return false;
}
break;
-#ifdef HAVE_TUNEMU
+#ifdef ENABLE_TUNEMU
case DEVICE_TYPE_TUNEMU:
if(tunemu_write(device_fd, packet->data + 14, packet->len - 14) < 0) {
- logger(LOG_ERR, _("Error while writing to %s %s: %s"), device_info,
+ logger(LOG_ERR, "Error while writing to %s %s: %s", device_info,
device, strerror(errno));
return false;
}
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);
+static void dump_device_stats(void) {
+ logger(LOG_DEBUG, "Statistics for %s %s:", device_info, device);
+ logger(LOG_DEBUG, " total bytes in: %10"PRIu64, device_total_in);
+ logger(LOG_DEBUG, " total bytes out: %10"PRIu64, device_total_out);
}
+
+const devops_t os_devops = {
+ .setup = setup_device,
+ .close = close_device,
+ .read = read_packet,
+ .write = write_packet,
+ .dump_stats = dump_device_stats,
+};
projects / tinc / blobdiff