#include "system.h"
-#ifdef HAVE_LINUX_IF_TUN_H
#include <linux/if_tun.h>
#define DEFAULT_DEVICE "/dev/net/tun"
-#else
-#define DEFAULT_DEVICE "/dev/tap0"
-#endif
#include "conf.h"
#include "device.h"
#include "route.h"
#include "utils.h"
#include "xalloc.h"
+#include "device.h"
typedef enum device_type_t {
- DEVICE_TYPE_ETHERTAP,
DEVICE_TYPE_TUN,
DEVICE_TYPE_TAP,
} device_type_t;
static device_type_t device_type;
char *device = NULL;
char *iface = NULL;
+static char *type = NULL;
static char ifrname[IFNAMSIZ];
static char *device_info;
-static uint64_t device_total_in = 0;
-static uint64_t device_total_out = 0;
+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) {
- struct ifreq ifr;
- bool t1q = false;
-
if(!get_config_string(lookup_config(config_tree, "Device"), &device))
device = xstrdup(DEFAULT_DEVICE);
device_fd = open(device, O_RDWR | O_NONBLOCK);
if(device_fd < 0) {
- logger(LOG_ERR, "Could not open %s: %s", device, strerror(errno));
+ logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s: %s", device, strerror(errno));
return false;
}
fcntl(device_fd, F_SETFD, FD_CLOEXEC);
#endif
-#ifdef HAVE_LINUX_IF_TUN_H
- /* Ok now check if this is an old ethertap or a new tun/tap thingie */
+ struct ifreq ifr = {{{0}}};
- memset(&ifr, 0, sizeof(ifr));
- if(routing_mode == RMODE_ROUTER) {
+ get_config_string(lookup_config(config_tree, "DeviceType"), &type);
+
+ if(type && strcasecmp(type, "tun") && strcasecmp(type, "tap")) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Unknown device type %s!", type);
+ return false;
+ }
+
+ if((type && !strcasecmp(type, "tun")) || (!type && routing_mode == RMODE_ROUTER)) {
ifr.ifr_flags = IFF_TUN;
device_type = DEVICE_TYPE_TUN;
device_info = "Linux tun/tap device (tun mode)";
#ifdef IFF_ONE_QUEUE
/* Set IFF_ONE_QUEUE flag... */
+
+ bool t1q = false;
if(get_config_bool(lookup_config(config_tree, "IffOneQueue"), &t1q) && t1q)
ifr.ifr_flags |= IFF_ONE_QUEUE;
#endif
if(iface) free(iface);
iface = xstrdup(ifrname);
} else if(!ioctl(device_fd, (('T' << 8) | 202), &ifr)) {
- logger(LOG_WARNING, "Old ioctl() request was needed for %s", device);
+ logger(DEBUG_ALWAYS, LOG_WARNING, "Old ioctl() request was needed for %s", device);
strncpy(ifrname, ifr.ifr_name, IFNAMSIZ);
if(iface) free(iface);
iface = xstrdup(ifrname);
- } else
-#endif
- {
- if(routing_mode == RMODE_ROUTER)
- overwrite_mac = true;
- device_info = "Linux ethertap device";
- device_type = DEVICE_TYPE_ETHERTAP;
- if(iface)
- free(iface);
- iface = xstrdup(strrchr(device, '/') ? strrchr(device, '/') + 1 : device);
}
- logger(LOG_INFO, "%s is a %s", device, device_info);
+ logger(DEBUG_ALWAYS, LOG_INFO, "%s is a %s", device, device_info);
return true;
}
static void close_device(void) {
close(device_fd);
+ free(type);
free(device);
free(iface);
}
static bool read_packet(vpn_packet_t *packet) {
- int lenin;
+ int inlen;
switch(device_type) {
case DEVICE_TYPE_TUN:
- lenin = read(device_fd, packet->data + 10, MTU - 10);
+ inlen = read(device_fd, packet->data + 10, MTU - 10);
- if(lenin <= 0) {
- logger(LOG_ERR, "Error while reading from %s %s: %s",
+ if(inlen <= 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s",
device_info, device, strerror(errno));
return false;
}
- packet->len = lenin + 10;
+ packet->len = inlen + 10;
break;
case DEVICE_TYPE_TAP:
- lenin = read(device_fd, packet->data, MTU);
+ inlen = read(device_fd, packet->data, MTU);
- if(lenin <= 0) {
- logger(LOG_ERR, "Error while reading from %s %s: %s",
+ if(inlen <= 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s",
device_info, device, strerror(errno));
return false;
}
- packet->len = lenin;
- break;
- case DEVICE_TYPE_ETHERTAP:
- lenin = read(device_fd, packet->data - 2, MTU + 2);
-
- if(lenin <= 0) {
- logger(LOG_ERR, "Error while reading from %s %s: %s",
- device_info, device, strerror(errno));
- return false;
- }
-
- packet->len = lenin - 2;
+ packet->len = inlen;
break;
+ default:
+ abort();
}
- device_total_in += packet->len;
+ device_in_packets++;
+ device_in_bytes += packet->len;
- ifdebug(TRAFFIC) logger(LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
+ logger(DEBUG_TRAFFIC, LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
device_info);
return true;
}
static bool write_packet(vpn_packet_t *packet) {
- ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s",
+ logger(DEBUG_TRAFFIC, LOG_DEBUG, "Writing packet of %d bytes to %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) {
- logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device,
+ 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) {
- logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device,
- strerror(errno));
- return false;
- }
- break;
- case DEVICE_TYPE_ETHERTAP:
- *(short int *)(packet->data - 2) = packet->len;
-
- if(write(device_fd, packet->data - 2, packet->len + 2) < 0) {
- logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device,
+ logger(DEBUG_ALWAYS, LOG_ERR, "Can't write to %s %s: %s", device_info, device,
strerror(errno));
return false;
}
break;
+ default:
+ abort();
}
- device_total_out += packet->len;
+ device_out_packets++;
+ device_out_bytes += packet->len;
return true;
}
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);
+ 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 = {