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Release 4.12 include/net/cipso_ipv4.h

Directory: include/net
/*
 * CIPSO - Commercial IP Security Option
 *
 * This is an implementation of the CIPSO 2.2 protocol as specified in
 * draft-ietf-cipso-ipsecurity-01.txt with additional tag types as found in
 * FIPS-188, copies of both documents can be found in the Documentation
 * directory.  While CIPSO never became a full IETF RFC standard many vendors
 * have chosen to adopt the protocol and over the years it has become a
 * de-facto standard for labeled networking.
 *
 * Author: Paul Moore <paul@paul-moore.com>
 *
 */

/*
 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
 *
 * 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
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY;  without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 * 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef _CIPSO_IPV4_H

#define _CIPSO_IPV4_H

#include <linux/types.h>
#include <linux/rcupdate.h>
#include <linux/list.h>
#include <linux/net.h>
#include <linux/skbuff.h>
#include <net/netlabel.h>
#include <net/request_sock.h>
#include <linux/atomic.h>
#include <asm/unaligned.h>

/* known doi values */

#define CIPSO_V4_DOI_UNKNOWN          0x00000000

/* standard tag types */

#define CIPSO_V4_TAG_INVALID          0

#define CIPSO_V4_TAG_RBITMAP          1

#define CIPSO_V4_TAG_ENUM             2

#define CIPSO_V4_TAG_RANGE            5

#define CIPSO_V4_TAG_PBITMAP          6

#define CIPSO_V4_TAG_FREEFORM         7

/* non-standard tag types (tags > 127) */

#define CIPSO_V4_TAG_LOCAL            128

/* doi mapping types */

#define CIPSO_V4_MAP_UNKNOWN          0

#define CIPSO_V4_MAP_TRANS            1

#define CIPSO_V4_MAP_PASS             2

#define CIPSO_V4_MAP_LOCAL            3

/* limits */

#define CIPSO_V4_MAX_REM_LVLS         255

#define CIPSO_V4_INV_LVL              0x80000000

#define CIPSO_V4_MAX_LOC_LVLS         (CIPSO_V4_INV_LVL - 1)

#define CIPSO_V4_MAX_REM_CATS         65534

#define CIPSO_V4_INV_CAT              0x80000000

#define CIPSO_V4_MAX_LOC_CATS         (CIPSO_V4_INV_CAT - 1)

/*
 * CIPSO DOI definitions
 */

/* DOI definition struct */

#define CIPSO_V4_TAG_MAXCNT           5

struct cipso_v4_doi {
	
u32 doi;
	
u32 type;
	union {
		
struct cipso_v4_std_map_tbl *std;
	
} map;
	
u8 tags[CIPSO_V4_TAG_MAXCNT];

	
atomic_t refcount;
	
struct list_head list;
	
struct rcu_head rcu;
};

/* Standard CIPSO mapping table */
/* NOTE: the highest order bit (i.e. 0x80000000) is an 'invalid' flag, if the
 *       bit is set then consider that value as unspecified, meaning the
 *       mapping for that particular level/category is invalid */

struct cipso_v4_std_map_tbl {
	struct {
		
u32 *cipso;
		
u32 *local;
		
u32 cipso_size;
		
u32 local_size;
	
} lvl;
	struct {
		
u32 *cipso;
		
u32 *local;
		
u32 cipso_size;
		
u32 local_size;
	
} cat;
};

/*
 * Sysctl Variables
 */

#ifdef CONFIG_NETLABEL
extern int cipso_v4_cache_enabled;
extern int cipso_v4_cache_bucketsize;
extern int cipso_v4_rbm_optfmt;
extern int cipso_v4_rbm_strictvalid;
#endif

/*
 * DOI List Functions
 */

#ifdef CONFIG_NETLABEL
int cipso_v4_doi_add(struct cipso_v4_doi *doi_def,
		     struct netlbl_audit *audit_info);
void cipso_v4_doi_free(struct cipso_v4_doi *doi_def);
int cipso_v4_doi_remove(u32 doi, struct netlbl_audit *audit_info);
struct cipso_v4_doi *cipso_v4_doi_getdef(u32 doi);
void cipso_v4_doi_putdef(struct cipso_v4_doi *doi_def);
int cipso_v4_doi_walk(u32 *skip_cnt,
		     int (*callback) (struct cipso_v4_doi *doi_def, void *arg),
	             void *cb_arg);
#else

static inline int cipso_v4_doi_add(struct cipso_v4_doi *doi_def, struct netlbl_audit *audit_info) { return -ENOSYS; }

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static inline void cipso_v4_doi_free(struct cipso_v4_doi *doi_def) { return; }

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static inline int cipso_v4_doi_remove(u32 doi, struct netlbl_audit *audit_info) { return 0; }

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static inline struct cipso_v4_doi *cipso_v4_doi_getdef(u32 doi) { return NULL; }

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static inline int cipso_v4_doi_walk(u32 *skip_cnt, int (*callback) (struct cipso_v4_doi *doi_def, void *arg), void *cb_arg) { return 0; }

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static inline int cipso_v4_doi_domhsh_add(struct cipso_v4_doi *doi_def, const char *domain) { return -ENOSYS; }

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static inline int cipso_v4_doi_domhsh_remove(struct cipso_v4_doi *doi_def, const char *domain) { return 0; }

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#endif /* CONFIG_NETLABEL */ /* * Label Mapping Cache Functions */ #ifdef CONFIG_NETLABEL void cipso_v4_cache_invalidate(void); int cipso_v4_cache_add(const unsigned char *cipso_ptr, const struct netlbl_lsm_secattr *secattr); #else
static inline void cipso_v4_cache_invalidate(void) { return; }

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static inline int cipso_v4_cache_add(const unsigned char *cipso_ptr, const struct netlbl_lsm_secattr *secattr) { return 0; }

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#endif /* CONFIG_NETLABEL */ /* * Protocol Handling Functions */ #ifdef CONFIG_NETLABEL void cipso_v4_error(struct sk_buff *skb, int error, u32 gateway); int cipso_v4_getattr(const unsigned char *cipso, struct netlbl_lsm_secattr *secattr); int cipso_v4_sock_setattr(struct sock *sk, const struct cipso_v4_doi *doi_def, const struct netlbl_lsm_secattr *secattr); void cipso_v4_sock_delattr(struct sock *sk); int cipso_v4_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr); int cipso_v4_req_setattr(struct request_sock *req, const struct cipso_v4_doi *doi_def, const struct netlbl_lsm_secattr *secattr); void cipso_v4_req_delattr(struct request_sock *req); int cipso_v4_skbuff_setattr(struct sk_buff *skb, const struct cipso_v4_doi *doi_def, const struct netlbl_lsm_secattr *secattr); int cipso_v4_skbuff_delattr(struct sk_buff *skb); int cipso_v4_skbuff_getattr(const struct sk_buff *skb, struct netlbl_lsm_secattr *secattr); unsigned char *cipso_v4_optptr(const struct sk_buff *skb); int cipso_v4_validate(const struct sk_buff *skb, unsigned char **option); #else
static inline void cipso_v4_error(struct sk_buff *skb, int error, u32 gateway) { return; }

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static inline int cipso_v4_getattr(const unsigned char *cipso, struct netlbl_lsm_secattr *secattr) { return -ENOSYS; }

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static inline int cipso_v4_sock_setattr(struct sock *sk, const struct cipso_v4_doi *doi_def, const struct netlbl_lsm_secattr *secattr) { return -ENOSYS; }

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static inline void cipso_v4_sock_delattr(struct sock *sk) { }

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static inline int cipso_v4_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr) { return -ENOSYS; }

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static inline int cipso_v4_req_setattr(struct request_sock *req, const struct cipso_v4_doi *doi_def, const struct netlbl_lsm_secattr *secattr) { return -ENOSYS; }

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static inline void cipso_v4_req_delattr(struct request_sock *req) { return; }

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static inline int cipso_v4_skbuff_setattr(struct sk_buff *skb, const struct cipso_v4_doi *doi_def, const struct netlbl_lsm_secattr *secattr) { return -ENOSYS; }

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static inline int cipso_v4_skbuff_delattr(struct sk_buff *skb) { return -ENOSYS; }

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static inline int cipso_v4_skbuff_getattr(const struct sk_buff *skb, struct netlbl_lsm_secattr *secattr) { return -ENOSYS; }

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static inline unsigned char *cipso_v4_optptr(const struct sk_buff *skb) { return NULL; }

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static inline int cipso_v4_validate(const struct sk_buff *skb, unsigned char **option) { unsigned char *opt = *option; unsigned char err_offset = 0; u8 opt_len = opt[1]; u8 opt_iter; u8 tag_len; if (opt_len < 8) { err_offset = 1; goto out; } if (get_unaligned_be32(&opt[2]) == 0) { err_offset = 2; goto out; } for (opt_iter = 6; opt_iter < opt_len;) { if (opt_iter + 1 == opt_len) { err_offset = opt_iter; goto out; } tag_len = opt[opt_iter + 1]; if ((tag_len == 0) || (tag_len > (opt_len - opt_iter))) { err_offset = opt_iter + 1; goto out; } opt_iter += tag_len; } out: *option = opt + err_offset; return err_offset; }

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Eric Dumazet1710.12%116.67%
Total168100.00%6100.00%

#endif /* CONFIG_NETLABEL */ #endif /* _CIPSO_IPV4_H */

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Eric Dumazet171.54%14.76%
Jeff Kirsher10.09%14.76%
Arun Sharma10.09%14.76%
Total1101100.00%21100.00%
Directory: include/net
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