Robert Watson a557af222b Introduce a MAC label reference in 'struct inpcb', which caches ... the MAC label referenced from 'struct socket' in the IPv4 and IPv6-based protocols. This permits MAC labels to be checked during network delivery operations without dereferencing inp->inp_socket to get to so->so_label, which will eventually avoid our having to grab the socket lock during delivery at the network layer. This change introduces 'struct inpcb' as a labeled object to the MAC Framework, along with the normal circus of entry points: initialization, creation from socket, destruction, as well as a delivery access control check. For most policies, the inpcb label will simply be a cache of the socket label, so a new protocol switch method is introduced, pr_sosetlabel() to notify protocols that the socket layer label has been updated so that the cache can be updated while holding appropriate locks. Most protocols implement this using pru_sosetlabel_null(), but IPv4/IPv6 protocols using inpcbs use the the worker function in_pcbsosetlabel(), which calls into the MAC Framework to perform a cache update. Biba, LOMAC, and MLS implement these entry points, as do the stub policy, and test policy. Reviewed by: sam, bms Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories		2003-11-18 00:39:07 +00:00
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natm_pcb.c	Style(9): remove unneccesary space and blank lines, indentation,	2003-08-06 13:46:15 +00:00
natm_proto.c	o add a flags parameter to netisr_register that is used to specify	2003-11-08 22:28:40 +00:00
natm.c	Introduce a MAC label reference in 'struct inpcb', which caches	2003-11-18 00:39:07 +00:00
natm.h	Remove the last vestiges of ATM raw mode. This has not been useful for a	2003-08-06 14:34:38 +00:00