--- /dev/null
+/*
+ * 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.moore@hp.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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#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>
+
+/* known doi values */
+#define CIPSO_V4_DOI_UNKNOWN 0x00000000
+
+/* 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
+
+/* doi mapping types */
+#define CIPSO_V4_MAP_UNKNOWN 0
+#define CIPSO_V4_MAP_STD 1
+#define CIPSO_V4_MAP_PASS 2
+
+/* 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];
+
+ u32 valid;
+ struct list_head list;
+ struct rcu_head rcu;
+ struct list_head dom_list;
+};
+
+/* 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
+
+/*
+ * Helper Functions
+ */
+
+#define CIPSO_V4_OPTEXIST(x) (IPCB(x)->opt.cipso != 0)
+#define CIPSO_V4_OPTPTR(x) ((x)->nh.raw + IPCB(x)->opt.cipso)
+
+/*
+ * DOI List Functions
+ */
+
+#ifdef CONFIG_NETLABEL
+int cipso_v4_doi_add(struct cipso_v4_doi *doi_def);
+int cipso_v4_doi_remove(u32 doi,
+ struct netlbl_audit *audit_info,
+ void (*callback) (struct rcu_head * head));
+struct cipso_v4_doi *cipso_v4_doi_getdef(u32 doi);
+int cipso_v4_doi_walk(u32 *skip_cnt,
+ int (*callback) (struct cipso_v4_doi *doi_def, void *arg),
+ void *cb_arg);
+int cipso_v4_doi_domhsh_add(struct cipso_v4_doi *doi_def, const char *domain);
+int cipso_v4_doi_domhsh_remove(struct cipso_v4_doi *doi_def,
+ const char *domain);
+#else
+static inline int cipso_v4_doi_add(struct cipso_v4_doi *doi_def)
+{
+ return -ENOSYS;
+}
+
+static inline int cipso_v4_doi_remove(u32 doi,
+ struct netlbl_audit *audit_info,
+ void (*callback) (struct rcu_head * head))
+{
+ return 0;
+}
+
+static inline struct cipso_v4_doi *cipso_v4_doi_getdef(u32 doi)
+{
+ return NULL;
+}
+
+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;
+}
+
+static inline int cipso_v4_doi_domhsh_add(struct cipso_v4_doi *doi_def,
+ const char *domain)
+{
+ return -ENOSYS;
+}
+
+static inline int cipso_v4_doi_domhsh_remove(struct cipso_v4_doi *doi_def,
+ const char *domain)
+{
+ return 0;
+}
+#endif /* CONFIG_NETLABEL */
+
+/*
+ * Label Mapping Cache Functions
+ */
+
+#ifdef CONFIG_NETLABEL
+void cipso_v4_cache_invalidate(void);
+int cipso_v4_cache_add(const struct sk_buff *skb,
+ const struct netlbl_lsm_secattr *secattr);
+#else
+static inline void cipso_v4_cache_invalidate(void)
+{
+ return;
+}
+
+static inline int cipso_v4_cache_add(const struct sk_buff *skb,
+ const struct netlbl_lsm_secattr *secattr)
+{
+ return 0;
+}
+#endif /* CONFIG_NETLABEL */
+
+/*
+ * Protocol Handling Functions
+ */
+
+#ifdef CONFIG_NETLABEL
+void cipso_v4_error(struct sk_buff *skb, int error, u32 gateway);
+int cipso_v4_socket_setattr(const struct socket *sock,
+ const struct cipso_v4_doi *doi_def,
+ const struct netlbl_lsm_secattr *secattr);
+int cipso_v4_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr);
+int cipso_v4_socket_getattr(const struct socket *sock,
+ struct netlbl_lsm_secattr *secattr);
+int cipso_v4_skbuff_getattr(const struct sk_buff *skb,
+ struct netlbl_lsm_secattr *secattr);
+int cipso_v4_validate(unsigned char **option);
+#else
+static inline void cipso_v4_error(struct sk_buff *skb,
+ int error,
+ u32 gateway)
+{
+ return;
+}
+
+static inline int cipso_v4_socket_setattr(const struct socket *sock,
+ const struct cipso_v4_doi *doi_def,
+ const struct netlbl_lsm_secattr *secattr)
+{
+ return -ENOSYS;
+}
+
+static inline int cipso_v4_sock_getattr(struct sock *sk,
+ struct netlbl_lsm_secattr *secattr)
+{
+ return -ENOSYS;
+}
+
+static inline int cipso_v4_socket_getattr(const struct socket *sock,
+ struct netlbl_lsm_secattr *secattr)
+{
+ return -ENOSYS;
+}
+
+static inline int cipso_v4_skbuff_getattr(const struct sk_buff *skb,
+ struct netlbl_lsm_secattr *secattr)
+{
+ return -ENOSYS;
+}
+
+static inline int cipso_v4_validate(unsigned char **option)
+{
+ return -ENOSYS;
+}
+#endif /* CONFIG_NETLABEL */
+
+#endif /* _CIPSO_IPV4_H */
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