/*
device.c -- Interaction BSD tun/tap device
Copyright (C) 2001-2005 Ivo Timmermans,
- 2001-2011 Guus Sliepen <guus@tinc-vpn.org>
+ 2001-2012 Guus Sliepen <guus@tinc-vpn.org>
2009 Grzegorz Dymarek <gregd72002@googlemail.com>
This program is free software; you can redistribute it and/or modify
#include "system.h"
#include "conf.h"
+#include "device.h"
#include "logger.h"
#include "net.h"
#include "route.h"
#include "bsd/tunemu.h"
#endif
-#define DEFAULT_DEVICE "/dev/tun0"
+#define DEFAULT_TUN_DEVICE "/dev/tun0"
+#if defined(HAVE_FREEBSD) || defined(HAVE_NETBSD)
+#define DEFAULT_TAP_DEVICE "/dev/tap0"
+#else
+#define DEFAULT_TAP_DEVICE "/dev/tun0"
+#endif
typedef enum device_type {
DEVICE_TYPE_TUN,
static device_type_t device_type = DEVICE_TYPE_TUN;
#endif
-bool setup_device(void) {
+static bool setup_device(void) {
char *type;
- if(!get_config_string(lookup_config(config_tree, "Device"), &device))
- device = xstrdup(DEFAULT_DEVICE);
+ 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, "Interface"), &iface))
iface = xstrdup(strrchr(device, '/') ? strrchr(device, '/') + 1 : device);
else if(!strcasecmp(type, "tap"))
device_type = DEVICE_TYPE_TAP;
else {
- logger(LOG_ERR, "Unknown device type %s!", type);
+ logger(DEBUG_ALWAYS, LOG_ERR, "Unknown device type %s!", type);
return false;
}
} else {
}
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;
}
+#ifdef FD_CLOEXEC
+ fcntl(device_fd, F_SETFD, FD_CLOEXEC);
+#endif
+
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(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "ioctl", strerror(errno));
return false;
}
}
{
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(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "ioctl", strerror(errno));
return false;
}
}
#endif
}
- logger(LOG_INFO, "%s is a %s", device, device_info);
+ logger(DEBUG_ALWAYS, LOG_INFO, "%s is a %s", device, device_info);
return true;
}
-void close_device(void) {
+static void close_device(void) {
switch(device_type) {
#ifdef HAVE_TUNEMU
case DEVICE_TYPE_TUNEMU:
free(iface);
}
-bool read_packet(vpn_packet_t *packet) {
+static bool read_packet(vpn_packet_t *packet) {
int inlen;
switch(device_type) {
inlen = read(device_fd, packet->data + 14, MTU - 14);
if(inlen <= 0) {
- logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info,
device, strerror(errno));
return false;
}
packet->data[13] = 0xDD;
break;
default:
- ifdebug(TRAFFIC) logger(LOG_ERR,
+ logger(DEBUG_TRAFFIC, LOG_ERR,
"Unknown IP version %d while reading packet from %s %s",
packet->data[14] >> 4, device_info, device);
return false;
struct iovec vector[2] = {{&type, sizeof type}, {packet->data + 14, MTU - 14}};
if((inlen = readv(device_fd, vector, 2)) <= 0) {
- logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info,
device, strerror(errno));
return false;
}
break;
default:
- ifdebug(TRAFFIC) logger(LOG_ERR,
+ logger(DEBUG_TRAFFIC, LOG_ERR,
"Unknown address family %x while reading packet from %s %s",
ntohl(type), device_info, device);
return false;
case DEVICE_TYPE_TAP:
if((inlen = read(device_fd, packet->data, MTU)) <= 0) {
- logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
+ logger(DEBUG_ALWAYS, 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",
+ logger(DEBUG_TRAFFIC, LOG_DEBUG, "Read packet of %d bytes from %s",
packet->len, device_info);
return true;
}
-bool write_packet(vpn_packet_t *packet) {
- ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s",
+static bool write_packet(vpn_packet_t *packet) {
+ logger(DEBUG_TRAFFIC, 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(DEBUG_ALWAYS, LOG_ERR, "Error while writing to %s %s: %s", device_info,
device, strerror(errno));
return false;
}
type = htonl(AF_INET6);
break;
default:
- ifdebug(TRAFFIC) logger(LOG_ERR,
+ logger(DEBUG_TRAFFIC, LOG_ERR,
"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(DEBUG_ALWAYS, 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(DEBUG_ALWAYS, LOG_ERR, "Error while writing to %s %s: %s", device_info,
device, strerror(errno));
return false;
}
#ifdef HAVE_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(DEBUG_ALWAYS, LOG_ERR, "Error while writing to %s %s: %s", device_info,
device, strerror(errno));
return false;
}
return true;
}
-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);
+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_total_in);
+ logger(DEBUG_ALWAYS, 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,
+};