diff options
| author | Jiri Benc <jbenc@redhat.com> | 2012-02-09 09:34:41 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-02-13 00:45:38 -0500 |
| commit | 7a3198a89722ad9521d22b05938d357eac7460fa (patch) | |
| tree | ca5766b459c7a9a1502fa519a9d287c7c29dcd9c | |
| parent | 72e60278d7e4a600fd6e067b42a5822e72946d6e (diff) | |
ipv6: helper function to get tclass
Implement helper inline function to get traffic class from IPv6 header.
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/linux/ipv6.h | 5 | ||||
| -rw-r--r-- | net/ipv6/datagram.c | 2 |
2 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h index 743a16a4104..4847a64d3c0 100644 --- a/include/linux/ipv6.h +++ b/include/linux/ipv6.h @@ -233,6 +233,11 @@ static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb) return (struct ipv6hdr *)skb_transport_header(skb); } +static inline __u8 ipv6_tclass(const struct ipv6hdr *iph) +{ + return (ntohl(*(__be32 *)iph) >> 20) & 0xff; +} + /* This structure contains results of exthdrs parsing as offsets from skb->nh. diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c index 251e7cd75e8..76832c8dc89 100644 --- a/net/ipv6/datagram.c +++ b/net/ipv6/datagram.c @@ -485,7 +485,7 @@ int datagram_recv_ctl(struct sock *sk, struct msghdr *msg, struct sk_buff *skb) } if (np->rxopt.bits.rxtclass) { - int tclass = (ntohl(*(__be32 *)ipv6_hdr(skb)) >> 20) & 0xff; + int tclass = ipv6_tclass(ipv6_hdr(skb)); put_cmsg(msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass); } |