netlabel: Add network address selectors to the NetLabel/LSM domain mapping

This patch extends the NetLabel traffic labeling capabilities to individual
packets based not only on the LSM domain but the by the destination address
as well.  The changes here only affect the core NetLabel infrastructre,
changes to the NetLabel KAPI and individial protocol engines are also
required but are split out into a different patch to ease review.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Reviewed-by: James Morris <jmorris@namei.org>

1 files changed, 36 insertions, 2 deletions

diff --git a/net/netlabel/netlabel_domainhash.h b/net/netlabel/netlabel_domainhash.h
index afcc41a7432d..bfcb6763a1a1 100644
--- a/net/netlabel/netlabel_domainhash.h
+++ b/net/netlabel/netlabel_domainhash.h
@@ -11,7 +11,7 @@
  */
 
 /*
- * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
+ * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008
  *
  * This program is free software;  you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -36,16 +36,43 @@
 #include <linux/rcupdate.h>
 #include <linux/list.h>
 
+#include "netlabel_addrlist.h"
+
 /* Domain hash table size */
 /* XXX - currently this number is an uneducated guess */
 #define NETLBL_DOMHSH_BITSIZE       7
 
-/* Domain mapping definition struct */
+/* Domain mapping definition structures */
+#define netlbl_domhsh_addr4_entry(iter) \
+        container_of(iter, struct netlbl_domaddr4_map, list)
+struct netlbl_domaddr4_map {
+        u32 type;
+        union {
+                struct cipso_v4_doi *cipsov4;
+        } type_def;
+
+        struct netlbl_af4list list;
+};
+#define netlbl_domhsh_addr6_entry(iter) \
+        container_of(iter, struct netlbl_domaddr6_map, list)
+struct netlbl_domaddr6_map {
+        u32 type;
+
+        /* NOTE: no 'type_def' union needed at present since we don't currently
+         *       support any IPv6 labeling protocols */
+
+        struct netlbl_af6list list;
+};
+struct netlbl_domaddr_map {
+        struct list_head list4;
+        struct list_head list6;
+};
 struct netlbl_dom_map {
         char *domain;
         u32 type;
         union {
                 struct cipso_v4_doi *cipsov4;
+                struct netlbl_domaddr_map *addrsel;
         } type_def;
 
         u32 valid;
@@ -66,9 +93,16 @@ int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry,
 int netlbl_domhsh_remove(const char *domain, struct netlbl_audit *audit_info);
 int netlbl_domhsh_remove_default(struct netlbl_audit *audit_info);
 struct netlbl_dom_map *netlbl_domhsh_getentry(const char *domain);
+struct netlbl_domaddr4_map *netlbl_domhsh_getentry_af4(const char *domain,
+                                                       __be32 addr);
 int netlbl_domhsh_walk(u32 *skip_bkt,
                      u32 *skip_chain,
                      int (*callback) (struct netlbl_dom_map *entry, void *arg),
                      void *cb_arg);
 
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+struct netlbl_domaddr6_map *netlbl_domhsh_getentry_af6(const char *domain,
+                                                  const struct in6_addr *addr);
+#endif /* IPv6 */
+
 #endif