/*
device.c -- Interaction with Linux ethertap and tun/tap device
Copyright (C) 2001-2005 Ivo Timmermans,
- 2001-2013 Guus Sliepen <guus@tinc-vpn.org>
+ 2001-2014 Guus Sliepen <guus@tinc-vpn.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
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#include "system.h"
+#include "../system.h"
#include <linux/if_tun.h>
#define DEFAULT_DEVICE "/dev/net/tun"
-#include "conf.h"
-#include "device.h"
-#include "logger.h"
-#include "names.h"
-#include "net.h"
-#include "route.h"
-#include "utils.h"
-#include "xalloc.h"
-#include "device.h"
+#include "../conf.h"
+#include "../device.h"
+#include "../logger.h"
+#include "../names.h"
+#include "../net.h"
+#include "../route.h"
+#include "../utils.h"
+#include "../xalloc.h"
+#include "../device.h"
typedef enum device_type_t {
DEVICE_TYPE_TUN,
static char ifrname[IFNAMSIZ];
static char *device_info;
-uint64_t device_in_packets = 0;
-uint64_t device_in_bytes = 0;
-uint64_t device_out_packets = 0;
-uint64_t device_out_bytes = 0;
-
static bool setup_device(void) {
if(!get_config_string(lookup_config(config_tree, "Device"), &device))
device = xstrdup(DEFAULT_DEVICE);
device_type = DEVICE_TYPE_TUN;
device_info = "Linux tun/tap device (tun mode)";
} else {
+ if (routing_mode == RMODE_ROUTER)
+ overwrite_mac = true;
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
device_type = DEVICE_TYPE_TAP;
device_info = "Linux tun/tap device (tap mode)";
strncpy(ifrname, ifr.ifr_name, IFNAMSIZ);
free(iface);
iface = xstrdup(ifrname);
+ } else {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Could not create a tun/tap interface from %s: %s", device, strerror(errno));
+ return false;
}
logger(DEBUG_ALWAYS, LOG_INFO, "%s is a %s", device, device_info);
+ if(ifr.ifr_flags & IFF_TAP) {
+ struct ifreq ifr_mac = {};
+ if(!ioctl(device_fd, SIOCGIFHWADDR, &ifr_mac))
+ memcpy(mymac.x, ifr_mac.ifr_hwaddr.sa_data, ETH_ALEN);
+ else
+ logger(DEBUG_ALWAYS, LOG_WARNING, "Could not get MAC address of %s: %s", device, strerror(errno));
+ }
+
return true;
}
static void close_device(void) {
close(device_fd);
+ device_fd = -1;
- free(type);
- free(device);
- free(iface);
+ free(type); type = NULL;
+ free(device); device = NULL;
+ free(iface); iface = NULL;
+ device_info = NULL;
}
static bool read_packet(vpn_packet_t *packet) {
switch(device_type) {
case DEVICE_TYPE_TUN:
- inlen = read(device_fd, packet->data + 10, MTU - 10);
+ inlen = read(device_fd, DATA(packet) + 10, MTU - 10);
if(inlen <= 0) {
logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s",
return false;
}
- memset(packet->data, 0, 12);
+ memset(DATA(packet), 0, 12);
packet->len = inlen + 10;
break;
case DEVICE_TYPE_TAP:
- inlen = read(device_fd, packet->data, MTU);
+ inlen = read(device_fd, DATA(packet), MTU);
if(inlen <= 0) {
logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s",
abort();
}
- device_in_packets++;
- device_in_bytes += packet->len;
-
logger(DEBUG_TRAFFIC, LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
device_info);
switch(device_type) {
case DEVICE_TYPE_TUN:
- packet->data[10] = packet->data[11] = 0;
- if(write(device_fd, packet->data + 10, packet->len - 10) < 0) {
+ DATA(packet)[10] = DATA(packet)[11] = 0;
+ if(write(device_fd, DATA(packet) + 10, packet->len - 10) < 0) {
logger(DEBUG_ALWAYS, LOG_ERR, "Can't write to %s %s: %s", device_info, device,
strerror(errno));
return false;
}
break;
case DEVICE_TYPE_TAP:
- if(write(device_fd, packet->data, packet->len) < 0) {
+ if(write(device_fd, DATA(packet), packet->len) < 0) {
logger(DEBUG_ALWAYS, LOG_ERR, "Can't write to %s %s: %s", device_info, device,
strerror(errno));
return false;
abort();
}
- device_out_packets++;
- device_out_bytes += packet->len;
-
return true;
}
-static void dump_device_stats(void) {
- logger(DEBUG_ALWAYS, LOG_DEBUG, "Statistics for %s %s:", device_info, device);
- logger(DEBUG_ALWAYS, LOG_DEBUG, " total bytes in: %10"PRIu64, device_in_bytes);
- logger(DEBUG_ALWAYS, LOG_DEBUG, " total bytes out: %10"PRIu64, device_out_bytes);
-}
-
const devops_t os_devops = {
.setup = setup_device,
.close = close_device,
.read = read_packet,
.write = write_packet,
- .dump_stats = dump_device_stats,
};