[NetLabel]: CIPSOv4 engine

Add support for the Commercial IP Security Option (CIPSO) to the IPv4
network stack.  CIPSO has become a de-facto standard for
trusted/labeled networking amongst existing Trusted Operating Systems
such as Trusted Solaris, HP-UX CMW, etc.  This implementation is
designed to be used with the NetLabel subsystem to provide explicit
packet labeling to LSM developers.

The CIPSO/IPv4 packet labeling works by the LSM calling a NetLabel API
function which attaches a CIPSO label (IPv4 option) to a given socket;
this in turn attaches the CIPSO label to every packet leaving the
socket without any extra processing on the outbound side.  On the
inbound side the individual packet's sk_buff is examined through a
call to a NetLabel API function to determine if a CIPSO/IPv4 label is
present and if so the security attributes of the CIPSO label are
returned to the caller of the NetLabel API function.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index e4b1a4d4dcf3..af61d9235409 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -411,6 +411,10 @@ enum
         NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS=115,
         NET_TCP_DMA_COPYBREAK=116,
         NET_TCP_SLOW_START_AFTER_IDLE=117,
+        NET_CIPSOV4_CACHE_ENABLE=118,
+        NET_CIPSOV4_CACHE_BUCKET_SIZE=119,
+        NET_CIPSOV4_RBM_OPTFMT=120,
+        NET_CIPSOV4_RBM_STRICTVALID=121,
 };
 
 enum {