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authorSimon Wunderlich <sw@simonwunderlich.de>2014-03-03 17:23:12 +0100
committerDavid S. Miller <davem@davemloft.net>2014-03-04 13:51:06 -0500
commit960d97f9518ef6fb8ff87450d6b0c88ce5df9532 (patch)
treee91b718ac33eecdf83271c01c93d20974b70ce67 /net
parentf3baa393ffc9a7aefc0bf767729382085e81f606 (diff)
downloadlinux-960d97f9518ef6fb8ff87450d6b0c88ce5df9532.tar.bz2
cfg80211: add MPLS and 802.21 classification
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>
Diffstat (limited to 'net')
-rw-r--r--net/wireless/util.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 780b4546c9c7..ad03af385556 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -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;
}