diff options
Diffstat (limited to 'include/net/netlabel.h')
| -rw-r--r-- | include/net/netlabel.h | 277 |
1 files changed, 242 insertions, 35 deletions
diff --git a/include/net/netlabel.h b/include/net/netlabel.h index 2e5b2f6f9fa..4fe018c48ed 100644 --- a/include/net/netlabel.h +++ b/include/net/netlabel.h @@ -4,12 +4,12 @@ * The NetLabel system manages static and dynamic label mappings for network * protocols such as CIPSO and RIPSO. * - * Author: Paul Moore <paul.moore@hp.com> + * Author: Paul Moore <paul@paul-moore.com> * */ /* - * (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 @@ -22,8 +22,7 @@ * the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. * */ @@ -31,10 +30,16 @@ #define _NETLABEL_H #include <linux/types.h> +#include <linux/slab.h> #include <linux/net.h> #include <linux/skbuff.h> +#include <linux/in.h> +#include <linux/in6.h> #include <net/netlink.h> -#include <asm/atomic.h> +#include <net/request_sock.h> +#include <linux/atomic.h> + +struct cipso_v4_doi; /* * NetLabel - A management interface for maintaining network packet label @@ -67,7 +72,13 @@ * 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 @@ -81,6 +92,8 @@ #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. @@ -96,26 +109,53 @@ /* NetLabel audit information */ struct netlbl_audit { u32 secid; - uid_t loginuid; + kuid_t loginuid; + unsigned int 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; }; -/* The catmap bitmap field MUST be a power of two in length and large + +/** + * 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. */ + * processing. + * + */ #define NETLBL_CATMAP_MAPTYPE u64 #define NETLBL_CATMAP_MAPCNT 4 #define NETLBL_CATMAP_MAPSIZE (sizeof(NETLBL_CATMAP_MAPTYPE) * 8) @@ -127,22 +167,53 @@ struct netlbl_lsm_secattr_catmap { 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) -struct netlbl_lsm_secattr { - u32 flags; - + NETLBL_SECATTR_MLS_CAT | \ + NETLBL_SECATTR_SECID) + u32 type; char *domain; - - u32 mls_lvl; - struct netlbl_lsm_secattr_catmap *mls_cat; - struct netlbl_lsm_cache *cache; + struct { + struct { + struct netlbl_lsm_secattr_catmap *cat; + u32 lvl; + } mls; + u32 secid; + } attr; }; /* @@ -231,10 +302,7 @@ static inline void netlbl_secattr_catmap_free( */ static inline void netlbl_secattr_init(struct netlbl_lsm_secattr *secattr) { - secattr->flags = 0; - secattr->domain = NULL; - secattr->mls_cat = NULL; - secattr->cache = NULL; + memset(secattr, 0, sizeof(*secattr)); } /** @@ -248,11 +316,12 @@ static inline void netlbl_secattr_init(struct netlbl_lsm_secattr *secattr) */ 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); - if (secattr->mls_cat) - netlbl_secattr_catmap_free(secattr->mls_cat); + if (secattr->flags & NETLBL_SECATTR_MLS_CAT) + netlbl_secattr_catmap_free(secattr->attr.mls.cat); } /** @@ -285,6 +354,40 @@ static inline void netlbl_secattr_free(struct netlbl_lsm_secattr *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 security attribute operations */ int netlbl_secattr_catmap_walk(struct netlbl_lsm_secattr_catmap *catmap, @@ -300,16 +403,28 @@ int netlbl_secattr_catmap_setrng(struct netlbl_lsm_secattr_catmap *catmap, gfp_t flags); /* - * LSM protocol operations + * 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_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 @@ -317,7 +432,66 @@ void netlbl_skbuff_err(struct sk_buff *skb, int error); 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_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) @@ -350,21 +524,49 @@ static inline int netlbl_enabled(void) return 0; } static inline int netlbl_sock_setattr(struct sock *sk, - const struct netlbl_lsm_secattr *secattr) + 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_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; } @@ -377,6 +579,11 @@ static inline int netlbl_cache_add(const struct sk_buff *skb, { 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 */ |