#include <net/netlink.h>
#include <asm/atomic.h>
+struct cipso_v4_doi;
+
/*
* NetLabel - A management interface for maintaining network packet label
* mapping tables for explicit packet labling protocols.
* NetLabel NETLINK protocol
*/
-#define NETLBL_PROTO_VERSION 1
+/* NetLabel NETLINK protocol version
+ * 1: initial version
+ * 2: added static labels for unlabeled connections
+ */
+#define NETLBL_PROTO_VERSION 2
/* NetLabel NETLINK types/families */
#define NETLBL_NLTYPE_NONE 0
struct netlbl_audit {
u32 secid;
uid_t loginuid;
+ u32 sessionid;
};
-/* Domain mapping definition struct */
-struct netlbl_dom_map;
-
-/* Domain mapping operations */
-int netlbl_domhsh_remove(const char *domain, struct netlbl_audit *audit_info);
+/*
+ * LSM security attributes
+ */
-/* LSM security attributes */
+/**
+ * struct netlbl_lsm_cache - NetLabel LSM security attribute cache
+ * @refcount: atomic reference counter
+ * @free: LSM supplied function to free the cache data
+ * @data: LSM supplied cache data
+ *
+ * Description:
+ * This structure is provided for LSMs which wish to make use of the NetLabel
+ * caching mechanism to store LSM specific data/attributes in the NetLabel
+ * cache. If the LSM has to perform a lot of translation from the NetLabel
+ * security attributes into it's own internal representation then the cache
+ * mechanism can provide a way to eliminate some or all of that translation
+ * overhead on a cache hit.
+ *
+ */
struct netlbl_lsm_cache {
atomic_t refcount;
void (*free) (const void *data);
void *data;
};
-struct netlbl_lsm_secattr {
- char *domain;
- u32 mls_lvl;
- u32 mls_lvl_vld;
- unsigned char *mls_cat;
- size_t mls_cat_len;
+/**
+ * struct netlbl_lsm_secattr_catmap - NetLabel LSM secattr category bitmap
+ * @startbit: the value of the lowest order bit in the bitmap
+ * @bitmap: the category bitmap
+ * @next: pointer to the next bitmap "node" or NULL
+ *
+ * Description:
+ * This structure is used to represent category bitmaps. Due to the large
+ * number of categories supported by most labeling protocols it is not
+ * practical to transfer a full bitmap internally so NetLabel adopts a sparse
+ * bitmap structure modeled after SELinux's ebitmap structure.
+ * The catmap bitmap field MUST be a power of two in length and large
+ * enough to hold at least 240 bits. Special care (i.e. check the code!)
+ * should be used when changing these values as the LSM implementation
+ * probably has functions which rely on the sizes of these types to speed
+ * processing.
+ *
+ */
+#define NETLBL_CATMAP_MAPTYPE u64
+#define NETLBL_CATMAP_MAPCNT 4
+#define NETLBL_CATMAP_MAPSIZE (sizeof(NETLBL_CATMAP_MAPTYPE) * 8)
+#define NETLBL_CATMAP_SIZE (NETLBL_CATMAP_MAPSIZE * \
+ NETLBL_CATMAP_MAPCNT)
+#define NETLBL_CATMAP_BIT (NETLBL_CATMAP_MAPTYPE)0x01
+struct netlbl_lsm_secattr_catmap {
+ u32 startbit;
+ NETLBL_CATMAP_MAPTYPE bitmap[NETLBL_CATMAP_MAPCNT];
+ struct netlbl_lsm_secattr_catmap *next;
+};
+/**
+ * struct netlbl_lsm_secattr - NetLabel LSM security attributes
+ * @flags: indicate structure attributes, see NETLBL_SECATTR_*
+ * @type: indicate the NLTYPE of the attributes
+ * @domain: the NetLabel LSM domain
+ * @cache: NetLabel LSM specific cache
+ * @attr.mls: MLS sensitivity label
+ * @attr.mls.cat: MLS category bitmap
+ * @attr.mls.lvl: MLS sensitivity level
+ * @attr.secid: LSM specific secid token
+ *
+ * Description:
+ * This structure is used to pass security attributes between NetLabel and the
+ * LSM modules. The flags field is used to specify which fields within the
+ * struct are valid and valid values can be created by bitwise OR'ing the
+ * NETLBL_SECATTR_* defines. The domain field is typically set by the LSM to
+ * specify domain specific configuration settings and is not usually used by
+ * NetLabel itself when returning security attributes to the LSM.
+ *
+ */
+struct netlbl_lsm_secattr {
+ u32 flags;
+ /* bitmap values for 'flags' */
+#define NETLBL_SECATTR_NONE 0x00000000
+#define NETLBL_SECATTR_DOMAIN 0x00000001
+#define NETLBL_SECATTR_DOMAIN_CPY (NETLBL_SECATTR_DOMAIN | \
+ NETLBL_SECATTR_FREE_DOMAIN)
+#define NETLBL_SECATTR_CACHE 0x00000002
+#define NETLBL_SECATTR_MLS_LVL 0x00000004
+#define NETLBL_SECATTR_MLS_CAT 0x00000008
+#define NETLBL_SECATTR_SECID 0x00000010
+ /* bitmap meta-values for 'flags' */
+#define NETLBL_SECATTR_FREE_DOMAIN 0x01000000
+#define NETLBL_SECATTR_CACHEABLE (NETLBL_SECATTR_MLS_LVL | \
+ NETLBL_SECATTR_MLS_CAT | \
+ NETLBL_SECATTR_SECID)
+ u32 type;
+ char *domain;
struct netlbl_lsm_cache *cache;
+ union {
+ struct {
+ struct netlbl_lsm_secattr_catmap *cat;
+ u32 lvl;
+ } mls;
+ u32 secid;
+ } attr;
};
/*
- * LSM security attribute operations
+ * LSM security attribute operations (inline)
*/
-
/**
* netlbl_secattr_cache_alloc - Allocate and initialize a secattr cache
* @flags: the memory allocation flags
}
/**
+ * netlbl_secattr_catmap_alloc - Allocate a LSM secattr catmap
+ * @flags: memory allocation flags
+ *
+ * Description:
+ * Allocate memory for a LSM secattr catmap, returns a pointer on success, NULL
+ * on failure.
+ *
+ */
+static inline struct netlbl_lsm_secattr_catmap *netlbl_secattr_catmap_alloc(
+ gfp_t flags)
+{
+ return kzalloc(sizeof(struct netlbl_lsm_secattr_catmap), flags);
+}
+
+/**
+ * netlbl_secattr_catmap_free - Free a LSM secattr catmap
+ * @catmap: the category bitmap
+ *
+ * Description:
+ * Free a LSM secattr catmap.
+ *
+ */
+static inline void netlbl_secattr_catmap_free(
+ struct netlbl_lsm_secattr_catmap *catmap)
+{
+ struct netlbl_lsm_secattr_catmap *iter;
+
+ do {
+ iter = catmap;
+ catmap = catmap->next;
+ kfree(iter);
+ } while (catmap);
+}
+
+/**
* netlbl_secattr_init - Initialize a netlbl_lsm_secattr struct
* @secattr: the struct to initialize
*
*/
static inline void netlbl_secattr_destroy(struct netlbl_lsm_secattr *secattr)
{
- if (secattr->cache)
+ if (secattr->flags & NETLBL_SECATTR_FREE_DOMAIN)
+ kfree(secattr->domain);
+ if (secattr->flags & NETLBL_SECATTR_CACHE)
netlbl_secattr_cache_free(secattr->cache);
- kfree(secattr->domain);
- kfree(secattr->mls_cat);
+ if (secattr->flags & NETLBL_SECATTR_MLS_CAT)
+ netlbl_secattr_catmap_free(secattr->attr.mls.cat);
}
/**
kfree(secattr);
}
+#ifdef CONFIG_NETLABEL
+/*
+ * LSM configuration operations
+ */
+int netlbl_cfg_map_del(const char *domain, struct netlbl_audit *audit_info);
+int netlbl_cfg_unlbl_add_map(const char *domain,
+ struct netlbl_audit *audit_info);
+int netlbl_cfg_cipsov4_add_map(struct cipso_v4_doi *doi_def,
+ const char *domain,
+ struct netlbl_audit *audit_info);
+
/*
- * LSM protocol operations
+ * LSM security attribute operations
*/
+int netlbl_secattr_catmap_walk(struct netlbl_lsm_secattr_catmap *catmap,
+ u32 offset);
+int netlbl_secattr_catmap_walk_rng(struct netlbl_lsm_secattr_catmap *catmap,
+ u32 offset);
+int netlbl_secattr_catmap_setbit(struct netlbl_lsm_secattr_catmap *catmap,
+ u32 bit,
+ gfp_t flags);
+int netlbl_secattr_catmap_setrng(struct netlbl_lsm_secattr_catmap *catmap,
+ u32 start,
+ u32 end,
+ gfp_t flags);
-#ifdef CONFIG_NETLABEL
-int netlbl_socket_setattr(const struct socket *sock,
- const struct netlbl_lsm_secattr *secattr);
+/*
+ * LSM protocol operations (NetLabel LSM/kernel API)
+ */
+int netlbl_enabled(void);
+int netlbl_sock_setattr(struct sock *sk,
+ const struct netlbl_lsm_secattr *secattr);
int netlbl_sock_getattr(struct sock *sk,
struct netlbl_lsm_secattr *secattr);
-int netlbl_socket_getattr(const struct socket *sock,
- struct netlbl_lsm_secattr *secattr);
int netlbl_skbuff_getattr(const struct sk_buff *skb,
+ u16 family,
struct netlbl_lsm_secattr *secattr);
-void netlbl_skbuff_err(struct sk_buff *skb, int error);
+void netlbl_skbuff_err(struct sk_buff *skb, int error, int gateway);
+
+/*
+ * LSM label mapping cache operations
+ */
+void netlbl_cache_invalidate(void);
+int netlbl_cache_add(const struct sk_buff *skb,
+ const struct netlbl_lsm_secattr *secattr);
#else
-static inline int netlbl_socket_setattr(const struct socket *sock,
- const struct netlbl_lsm_secattr *secattr)
+static inline int netlbl_cfg_map_del(const char *domain,
+ struct netlbl_audit *audit_info)
{
return -ENOSYS;
}
-
-static inline int netlbl_sock_getattr(struct sock *sk,
- struct netlbl_lsm_secattr *secattr)
+static inline int netlbl_cfg_unlbl_add_map(const char *domain,
+ struct netlbl_audit *audit_info)
{
return -ENOSYS;
}
-
-static inline int netlbl_socket_getattr(const struct socket *sock,
- struct netlbl_lsm_secattr *secattr)
+static inline int netlbl_cfg_cipsov4_add_map(struct cipso_v4_doi *doi_def,
+ const char *domain,
+ struct netlbl_audit *audit_info)
+{
+ return -ENOSYS;
+}
+static inline int netlbl_secattr_catmap_walk(
+ struct netlbl_lsm_secattr_catmap *catmap,
+ u32 offset)
+{
+ return -ENOENT;
+}
+static inline int netlbl_secattr_catmap_walk_rng(
+ struct netlbl_lsm_secattr_catmap *catmap,
+ u32 offset)
+{
+ return -ENOENT;
+}
+static inline int netlbl_secattr_catmap_setbit(
+ struct netlbl_lsm_secattr_catmap *catmap,
+ u32 bit,
+ gfp_t flags)
+{
+ return 0;
+}
+static inline int netlbl_secattr_catmap_setrng(
+ struct netlbl_lsm_secattr_catmap *catmap,
+ u32 start,
+ u32 end,
+ gfp_t flags)
+{
+ return 0;
+}
+static inline int netlbl_enabled(void)
+{
+ return 0;
+}
+static inline int netlbl_sock_setattr(struct sock *sk,
+ const struct netlbl_lsm_secattr *secattr)
+{
+ return -ENOSYS;
+}
+static inline int netlbl_sock_getattr(struct sock *sk,
+ struct netlbl_lsm_secattr *secattr)
{
return -ENOSYS;
}
-
static inline int netlbl_skbuff_getattr(const struct sk_buff *skb,
+ u16 family,
struct netlbl_lsm_secattr *secattr)
{
return -ENOSYS;
}
-
-static inline void netlbl_skbuff_err(struct sk_buff *skb, int error)
+static inline void netlbl_skbuff_err(struct sk_buff *skb,
+ int error,
+ int gateway)
{
return;
}
-#endif /* CONFIG_NETLABEL */
-
-/*
- * LSM label mapping cache operations
- */
-
-#ifdef CONFIG_NETLABEL
-void netlbl_cache_invalidate(void);
-int netlbl_cache_add(const struct sk_buff *skb,
- const struct netlbl_lsm_secattr *secattr);
-#else
static inline void netlbl_cache_invalidate(void)
{
return;
}
-
static inline int netlbl_cache_add(const struct sk_buff *skb,
const struct netlbl_lsm_secattr *secattr)
{
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