#include <asm/system.h>
#include <asm/uaccess.h>
+/* Uncomment to enable debugging */
+/* #define TUN_DEBUG 1 */
+
#ifdef TUN_DEBUG
static int debug;
+
+#define DBG if(tun->debug)printk
+#define DBG1 if(debug==2)printk
+#else
+#define DBG( a... )
+#define DBG1( a... )
+#endif
+
+struct tun_struct {
+ struct list_head list;
+ unsigned long flags;
+ int attached;
+ uid_t owner;
+ gid_t group;
+
+ wait_queue_head_t read_wait;
+ struct sk_buff_head readq;
+
+ struct net_device *dev;
+
+ struct fasync_struct *fasync;
+
+ unsigned long if_flags;
+ u8 dev_addr[ETH_ALEN];
+ u32 chr_filter[2];
+ u32 net_filter[2];
+
+#ifdef TUN_DEBUG
+ int debug;
#endif
+};
/* Network device part of the driver */
return -EFAULT;
}
- if ((tun->flags & TUN_TYPE_MASK) == TUN_TAP_DEV)
+ if ((tun->flags & TUN_TYPE_MASK) == TUN_TAP_DEV) {
align = NET_IP_ALIGN;
+ if (unlikely(len < ETH_HLEN))
+ return -EINVAL;
+ }
if (!(skb = alloc_skb(len + align, GFP_KERNEL))) {
tun->dev->stats.rx_dropped++;