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mac80211: Assign correct TID for local bridged packets 

This patch assigns correct TID to frames transmitted between
two stations in the same BSS in AP mode.
The problem is that skb->protocol is not set to ETH_P_IP and it is wrong
to use that field at this stage.
The fix compares the LLC/Protocol headers explicitly to check if the
encapsulated frame is IP frame

Signed-off-by: Guy Cohen <guy.cohen@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Guy Cohen 2008-01-09 19:12:48 +02:00 committed by David S. Miller
parent 69a73829db
commit a8bdf29c6c
1 changed files with 5 additions and 4 deletions
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9
net/mac80211/wme.c
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@ -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)