diff options
| -rw-r--r-- | net/mac80211/wme.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/net/mac80211/wme.c b/net/mac80211/wme.c index 455fadc3d84e..024519522d37 100644 --- a/net/mac80211/wme.c +++ b/net/mac80211/wme.c @@ -28,6 +28,7 @@ struct ieee80211_sched_data struct sk_buff_head requeued[TC_80211_MAX_QUEUES]; }; +static const char llc_ip_hdr[8] = {0xAA, 0xAA, 0x3, 0, 0, 0, 0x08, 0}; /* given a data frame determine the 802.1p/1d tag to use */ static inline unsigned classify_1d(struct sk_buff *skb, struct Qdisc *qd) @@ -54,12 +55,12 @@ static inline unsigned classify_1d(struct sk_buff *skb, struct Qdisc *qd) return skb->priority - 256; /* check there is a valid IP header present */ - offset = ieee80211_get_hdrlen_from_skb(skb) + 8 /* LLC + proto */; - if (skb->protocol != htons(ETH_P_IP) || - skb->len < offset + sizeof(*ip)) + offset = ieee80211_get_hdrlen_from_skb(skb); + if (skb->len < offset + sizeof(llc_ip_hdr) + sizeof(*ip) || + memcmp(skb->data + offset, llc_ip_hdr, sizeof(llc_ip_hdr))) return 0; - ip = (struct iphdr *) (skb->data + offset); + ip = (struct iphdr *) (skb->data + offset + sizeof(llc_ip_hdr)); dscp = ip->tos & 0xfc; if (dscp & 0x1c) |