/*
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
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",
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;