[MLSXFRM]: Add flow labeling

This labels the flows that could utilize IPSec xfrms at the points the
flows are defined so that IPSec policy and SAs at the right label can
be used.

The following protos are currently not handled, but they should
continue to be able to use single-labeled IPSec like they currently
do.

ipmr
ip_gre
ipip
igmp
sit
sctp
ip6_tunnel (IPv6 over IPv6 tunnel device)
decnet

Signed-off-by: Venkat Yekkirala <vyekkirala@TrustedCS.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 356a8a7ef22a..dbfce089e916 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -358,6 +358,7 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
         fl.oif = iif;
         fl.fl_icmp_type = type;
         fl.fl_icmp_code = code;
+        security_skb_classify_flow(skb, &fl);
 
         if (icmpv6_xmit_lock())
                 return;
@@ -472,6 +473,7 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
                 ipv6_addr_copy(&fl.fl6_src, saddr);
         fl.oif = skb->dev->ifindex;
         fl.fl_icmp_type = ICMPV6_ECHO_REPLY;
+        security_skb_classify_flow(skb, &fl);
 
         if (icmpv6_xmit_lock())
                 return;