diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/tun.c | 38 |
1 files changed, 27 insertions, 11 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 4d461595406..a2c6caaaae9 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -18,6 +18,10 @@ /* * Changes: * + * Brian Braunstein <linuxkernel@bristyle.com> 2007/03/23 + * Fixed hw address handling. Now net_device.dev_addr is kept consistent + * with tun.dev_addr when the address is set by this module. + * * Mike Kershaw <dragorn@kismetwireless.net> 2005/08/14 * Add TUNSETLINK ioctl to set the link encapsulation * @@ -196,7 +200,10 @@ static void tun_net_init(struct net_device *dev) dev->set_multicast_list = tun_net_mclist; ether_setup(dev); - random_ether_addr(dev->dev_addr); + + /* random address already created for us by tun_set_iff, use it */ + memcpy(dev->dev_addr, tun->dev_addr, min(sizeof(tun->dev_addr), sizeof(dev->dev_addr)) ); + dev->tx_queue_len = TUN_READQ_SIZE; /* We prefer our own queue length */ break; } @@ -636,6 +643,7 @@ static int tun_chr_ioctl(struct inode *inode, struct file *file, return 0; case SIOCGIFHWADDR: + /* Note: the actual net device's address may be different */ memcpy(ifr.ifr_hwaddr.sa_data, tun->dev_addr, min(sizeof ifr.ifr_hwaddr.sa_data, sizeof tun->dev_addr)); if (copy_to_user( argp, &ifr, sizeof ifr)) @@ -643,16 +651,24 @@ static int tun_chr_ioctl(struct inode *inode, struct file *file, return 0; case SIOCSIFHWADDR: - /** Set the character device's hardware address. This is used when - * filtering packets being sent from the network device to the character - * device. */ - memcpy(tun->dev_addr, ifr.ifr_hwaddr.sa_data, - min(sizeof ifr.ifr_hwaddr.sa_data, sizeof tun->dev_addr)); - DBG(KERN_DEBUG "%s: set hardware address: %x:%x:%x:%x:%x:%x\n", - tun->dev->name, - tun->dev_addr[0], tun->dev_addr[1], tun->dev_addr[2], - tun->dev_addr[3], tun->dev_addr[4], tun->dev_addr[5]); - return 0; + { + /* try to set the actual net device's hw address */ + int ret = dev_set_mac_address(tun->dev, &ifr.ifr_hwaddr); + + if (ret == 0) { + /** Set the character device's hardware address. This is used when + * filtering packets being sent from the network device to the character + * device. */ + memcpy(tun->dev_addr, ifr.ifr_hwaddr.sa_data, + min(sizeof ifr.ifr_hwaddr.sa_data, sizeof tun->dev_addr)); + DBG(KERN_DEBUG "%s: set hardware address: %x:%x:%x:%x:%x:%x\n", + tun->dev->name, + tun->dev_addr[0], tun->dev_addr[1], tun->dev_addr[2], + tun->dev_addr[3], tun->dev_addr[4], tun->dev_addr[5]); + } + + return ret; + } case SIOCADDMULTI: /** Add the specified group to the character device's multicast filter |