*/
/*
- * (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
#include <linux/types.h>
#include <linux/net.h>
#include <linux/skbuff.h>
+#include <linux/in.h>
+#include <linux/in6.h>
#include <net/netlink.h>
+#include <net/request_sock.h>
+#include <asm/atomic.h>
+
+struct cipso_v4_doi;
/*
* NetLabel - A management interface for maintaining network packet label
* NetLabel NETLINK protocol
*/
-#define NETLBL_PROTO_VERSION 1
+/* NetLabel NETLINK protocol version
+ * 1: initial version
+ * 2: added static labels for unlabeled connections
+ * 3: network selectors added to the NetLabel/LSM domain mapping and the
+ * CIPSO_V4_MAP_LOCAL CIPSO mapping was added
+ */
+#define NETLBL_PROTO_VERSION 3
/* NetLabel NETLINK types/families */
#define NETLBL_NLTYPE_NONE 0
#define NETLBL_NLTYPE_CIPSOV6_NAME "NLBL_CIPSOv6"
#define NETLBL_NLTYPE_UNLABELED 5
#define NETLBL_NLTYPE_UNLABELED_NAME "NLBL_UNLBL"
+#define NETLBL_NLTYPE_ADDRSELECT 6
+#define NETLBL_NLTYPE_ADDRSELECT_NAME "NLBL_ADRSEL"
/*
* NetLabel - Kernel API for accessing the network packet label mappings.
*
*/
-/* Domain mapping definition struct */
-struct netlbl_dom_map;
+/* NetLabel audit information */
+struct netlbl_audit {
+ u32 secid;
+ uid_t loginuid;
+ u32 sessionid;
+};
-/* Domain mapping operations */
-int netlbl_domhsh_remove(const char *domain);
+/*
+ * 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_cache cache;
+/**
+ * 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;
+ struct {
+ 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
+ *
+ * Description:
+ * Allocate and initialize a netlbl_lsm_cache structure. Returns a pointer
+ * on success, NULL on failure.
+ *
+ */
+static inline struct netlbl_lsm_cache *netlbl_secattr_cache_alloc(gfp_t flags)
+{
+ struct netlbl_lsm_cache *cache;
+
+ cache = kzalloc(sizeof(*cache), flags);
+ if (cache)
+ atomic_set(&cache->refcount, 1);
+ return cache;
+}
+
+/**
+ * netlbl_secattr_cache_free - Frees a netlbl_lsm_cache struct
+ * @cache: the struct to free
+ *
+ * Description:
+ * Frees @secattr including all of the internal buffers.
+ *
*/
+static inline void netlbl_secattr_cache_free(struct netlbl_lsm_cache *cache)
+{
+ if (!atomic_dec_and_test(&cache->refcount))
+ return;
+ if (cache->free)
+ cache->free(cache->data);
+ kfree(cache);
+}
+
+/**
+ * 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
*
* Description:
- * Initialize an already allocated netlbl_lsm_secattr struct. Returns zero on
- * success, negative values on error.
+ * Initialize an already allocated netlbl_lsm_secattr struct.
*
*/
-static inline int netlbl_secattr_init(struct netlbl_lsm_secattr *secattr)
+static inline void netlbl_secattr_init(struct netlbl_lsm_secattr *secattr)
{
memset(secattr, 0, sizeof(*secattr));
- return 0;
}
/**
* netlbl_secattr_destroy - Clears a netlbl_lsm_secattr struct
* @secattr: the struct to clear
- * @clear_cache: cache clear flag
*
* Description:
* Destroys the @secattr struct, including freeing all of the internal buffers.
- * If @clear_cache is true then free the cache fields, otherwise leave them
- * intact. The struct must be reset with a call to netlbl_secattr_init()
- * before reuse.
+ * The struct must be reset with a call to netlbl_secattr_init() before reuse.
*
*/
-static inline void netlbl_secattr_destroy(struct netlbl_lsm_secattr *secattr,
- u32 clear_cache)
+static inline void netlbl_secattr_destroy(struct netlbl_lsm_secattr *secattr)
{
- if (clear_cache && secattr->cache.data != NULL && secattr->cache.free)
- secattr->cache.free(secattr->cache.data);
- kfree(secattr->domain);
- kfree(secattr->mls_cat);
+ if (secattr->flags & NETLBL_SECATTR_FREE_DOMAIN)
+ kfree(secattr->domain);
+ if (secattr->flags & NETLBL_SECATTR_CACHE)
+ netlbl_secattr_cache_free(secattr->cache);
+ if (secattr->flags & NETLBL_SECATTR_MLS_CAT)
+ netlbl_secattr_catmap_free(secattr->attr.mls.cat);
}
/**
* pointer on success, or NULL on failure.
*
*/
-static inline struct netlbl_lsm_secattr *netlbl_secattr_alloc(int flags)
+static inline struct netlbl_lsm_secattr *netlbl_secattr_alloc(gfp_t flags)
{
return kzalloc(sizeof(struct netlbl_lsm_secattr), flags);
}
/**
* netlbl_secattr_free - Frees a netlbl_lsm_secattr struct
* @secattr: the struct to free
- * @clear_cache: cache clear flag
*
* Description:
- * Frees @secattr including all of the internal buffers. If @clear_cache is
- * true then free the cache fields, otherwise leave them intact.
+ * Frees @secattr including all of the internal buffers.
*
*/
-static inline void netlbl_secattr_free(struct netlbl_lsm_secattr *secattr,
- u32 clear_cache)
+static inline void netlbl_secattr_free(struct netlbl_lsm_secattr *secattr)
{
- netlbl_secattr_destroy(secattr, clear_cache);
+ netlbl_secattr_destroy(secattr);
kfree(secattr);
}
+#ifdef CONFIG_NETLABEL
+/*
+ * LSM configuration operations
+ */
+int netlbl_cfg_map_del(const char *domain,
+ u16 family,
+ const void *addr,
+ const void *mask,
+ struct netlbl_audit *audit_info);
+int netlbl_cfg_unlbl_map_add(const char *domain,
+ u16 family,
+ const void *addr,
+ const void *mask,
+ struct netlbl_audit *audit_info);
+int netlbl_cfg_unlbl_static_add(struct net *net,
+ const char *dev_name,
+ const void *addr,
+ const void *mask,
+ u16 family,
+ u32 secid,
+ struct netlbl_audit *audit_info);
+int netlbl_cfg_unlbl_static_del(struct net *net,
+ const char *dev_name,
+ const void *addr,
+ const void *mask,
+ u16 family,
+ struct netlbl_audit *audit_info);
+int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
+ struct netlbl_audit *audit_info);
+void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info);
+int netlbl_cfg_cipsov4_map_add(u32 doi,
+ const char *domain,
+ const struct in_addr *addr,
+ const struct in_addr *mask,
+ 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,
+ u16 family,
+ const struct netlbl_lsm_secattr *secattr);
+void netlbl_sock_delattr(struct sock *sk);
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_conn_setattr(struct sock *sk,
+ struct sockaddr *addr,
+ const struct netlbl_lsm_secattr *secattr);
+int netlbl_req_setattr(struct request_sock *req,
+ const struct netlbl_lsm_secattr *secattr);
+void netlbl_req_delattr(struct request_sock *req);
+int netlbl_skbuff_setattr(struct sk_buff *skb,
+ u16 family,
+ const 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);
+
+/*
+ * Protocol engine operations
+ */
+struct audit_buffer *netlbl_audit_start(int type,
+ struct netlbl_audit *audit_info);
#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,
+ u16 family,
+ const void *addr,
+ const void *mask,
+ struct netlbl_audit *audit_info)
{
return -ENOSYS;
}
-
+static inline int netlbl_cfg_unlbl_map_add(const char *domain,
+ u16 family,
+ void *addr,
+ void *mask,
+ struct netlbl_audit *audit_info)
+{
+ return -ENOSYS;
+}
+static inline int netlbl_cfg_unlbl_static_add(struct net *net,
+ const char *dev_name,
+ const void *addr,
+ const void *mask,
+ u16 family,
+ u32 secid,
+ struct netlbl_audit *audit_info)
+{
+ return -ENOSYS;
+}
+static inline int netlbl_cfg_unlbl_static_del(struct net *net,
+ const char *dev_name,
+ const void *addr,
+ const void *mask,
+ u16 family,
+ struct netlbl_audit *audit_info)
+{
+ return -ENOSYS;
+}
+static inline int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
+ struct netlbl_audit *audit_info)
+{
+ return -ENOSYS;
+}
+static inline void netlbl_cfg_cipsov4_del(u32 doi,
+ struct netlbl_audit *audit_info)
+{
+ return;
+}
+static inline int netlbl_cfg_cipsov4_map_add(u32 doi,
+ const char *domain,
+ const struct in_addr *addr,
+ const struct in_addr *mask,
+ 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,
+ u16 family,
+ const struct netlbl_lsm_secattr *secattr)
+{
+ return -ENOSYS;
+}
+static inline void netlbl_sock_delattr(struct sock *sk)
+{
+}
static inline int netlbl_sock_getattr(struct sock *sk,
struct netlbl_lsm_secattr *secattr)
{
return -ENOSYS;
}
-
-static inline int netlbl_socket_getattr(const struct socket *sock,
- struct netlbl_lsm_secattr *secattr)
+static inline int netlbl_conn_setattr(struct sock *sk,
+ struct sockaddr *addr,
+ const struct netlbl_lsm_secattr *secattr)
+{
+ return -ENOSYS;
+}
+static inline int netlbl_req_setattr(struct request_sock *req,
+ const struct netlbl_lsm_secattr *secattr)
+{
+ return -ENOSYS;
+}
+static inline void netlbl_req_delattr(struct request_sock *req)
+{
+ return;
+}
+static inline int netlbl_skbuff_setattr(struct sk_buff *skb,
+ u16 family,
+ const 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)
{
return 0;
}
+static inline struct audit_buffer *netlbl_audit_start(int type,
+ struct netlbl_audit *audit_info)
+{
+ return NULL;
+}
#endif /* CONFIG_NETLABEL */
#endif /* _NETLABEL_H */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff