linux-toradex.git/net/netlabel/netlabel_calipso.c, branch v4.9.2

calipso: Add a label cache.

2016-06-27T19:06:17+00:00

This works in exactly the same way as the CIPSO label cache.
The idea is to allow the lsm to cache the result of a secattr
lookup so that it doesn't need to perform the lookup for
every skbuff.

It introduces two sysctl controls:
 calipso_cache_enable - enables/disables the cache.
 calipso_cache_bucket_size - sets the size of a cache bucket.

Signed-off-by: Huw Davies 
Signed-off-by: Paul Moore

calipso: Allow the lsm to label the skbuff directly.

2016-06-27T19:06:15+00:00

In some cases, the lsm needs to add the label to the skbuff directly.
A NF_INET_LOCAL_OUT IPv6 hook is added to selinux to match the IPv4
behaviour.  This allows selinux to label the skbuffs that it requires.

Signed-off-by: Huw Davies 
Signed-off-by: Paul Moore

calipso: Allow request sockets to be relabelled by the lsm.

2016-06-27T19:05:29+00:00

Request sockets need to have a label that takes into account the
incoming connection as well as their parent's label.  This is used
for the outgoing SYN-ACK and for their child full-socket.

Signed-off-by: Huw Davies 
Signed-off-by: Paul Moore

calipso: Set the calipso socket label to match the secattr.

2016-06-27T19:02:51+00:00

CALIPSO is a hop-by-hop IPv6 option.  A lot of this patch is based on
the equivalent CISPO code.  The main difference is due to manipulating
the options in the hop-by-hop header.

Signed-off-by: Huw Davies 
Signed-off-by: Paul Moore

netlabel: Add support for removing a CALIPSO DOI.

2016-06-27T19:02:49+00:00

Remove a specified DOI through the NLBL_CALIPSO_C_REMOVE command.
It requires the attribute:
 NLBL_CALIPSO_A_DOI.

Signed-off-by: Huw Davies 
Signed-off-by: Paul Moore

netlabel: Add support for enumerating the CALIPSO DOI list.

2016-06-27T19:02:48+00:00

Enumerate the DOI list through the NLBL_CALIPSO_C_LISTALL command.
It takes no attributes.

Signed-off-by: Huw Davies 
Signed-off-by: Paul Moore

netlabel: Add support for querying a CALIPSO DOI.

2016-06-27T19:02:47+00:00

Query a specified DOI through the NLBL_CALIPSO_C_LIST command.
It requires the attribute:
 NLBL_CALIPSO_A_DOI.

The reply will contain:
 NLBL_CALIPSO_A_MTYPE

Signed-off-by: Huw Davies 
Signed-off-by: Paul Moore

netlabel: Initial support for the CALIPSO netlink protocol.

2016-06-27T19:02:46+00:00

CALIPSO is a packet labelling protocol for IPv6 which is very similar
to CIPSO.  It is specified in RFC 5570.  Much of the code is based on
the current CIPSO code.

This adds support for adding passthrough-type CALIPSO DOIs through the
NLBL_CALIPSO_C_ADD command.  It requires attributes:

 NLBL_CALIPSO_A_TYPE which must be CALIPSO_MAP_PASS.
 NLBL_CALIPSO_A_DOI.

In passthrough mode the CALIPSO engine will map MLS secattr levels
and categories directly to the packet label.

At this stage, the major difference between this and the CIPSO
code is that IPv6 may be compiled as a module.  To allow for
this the CALIPSO functions are registered at module init time.

Signed-off-by: Huw Davies 
Signed-off-by: Paul Moore