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cfg80211: add MPLS and 802.21 classification

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MPLS labels may contain traffic control information, which should be
evaluated and used by the wireless subsystem if present.

Also check for IEEE 802.21 which is always network control traffic.

Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Simon Wunderlich 2014-03-03 17:23:12 +01:00 committed by David S. Miller
parent f3baa393ff
commit 960d97f951
1 changed files with 16 additions and 0 deletions
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16
net/wireless/util.c
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@ -11,6 +11,7 @@
#include <net/ip.h>
#include <net/dsfield.h>
#include <linux/if_vlan.h>
#include <linux/mpls.h>
#include "core.h"
#include "rdev-ops.h"
@ -717,6 +718,21 @@ unsigned int cfg80211_classify8021d(struct sk_buff *skb,
case htons(ETH_P_IPV6):
dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc;
break;
case htons(ETH_P_MPLS_UC):
case htons(ETH_P_MPLS_MC): {
struct mpls_label mpls_tmp, *mpls;
mpls = skb_header_pointer(skb, sizeof(struct ethhdr),
sizeof(*mpls), &mpls_tmp);
if (!mpls)
return 0;
return (ntohl(mpls->entry) & MPLS_LS_TC_MASK)
>> MPLS_LS_TC_SHIFT;
}
case htons(ETH_P_80221):
/* 802.21 is always network control traffic */
return 7;
default:
return 0;
}