/*
* NetLabel Domain Hash Table
*
* This file manages the domain hash table that NetLabel uses to determine
* which network labeling protocol to use for a given domain. The NetLabel
* system manages static and dynamic label mappings for network protocols such
* as CIPSO and RIPSO.
*
* Author: Paul Moore <paul@paul-moore.com>
*
*/
/*
* (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
* 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 _NETLABEL_DOMAINHASH_H
#define _NETLABEL_DOMAINHASH_H
#include <linux/types.h>
#include <linux/rcupdate.h>
#include <linux/list.h>
#include "netlabel_addrlist.h"
/* Domain hash table size */
/* XXX - currently this number is an uneducated guess */
#define NETLBL_DOMHSH_BITSIZE 7
/* Domain mapping definition structures */
#define netlbl_domhsh_addr4_entry(iter) \
container_of(iter, struct netlbl_domaddr4_map, list)
struct netlbl_domaddr4_map {
u32 type;
union {
struct cipso_v4_doi *cipsov4;
} type_def;
struct netlbl_af4list list;
};
#define netlbl_domhsh_addr6_entry(iter) \
container_of(iter, struct netlbl_domaddr6_map, list)
struct netlbl_domaddr6_map {
u32 type;
/* NOTE: no 'type_def' union needed at present since we don't currently
* support any IPv6 labeling protocols */
struct netlbl_af6list list;
};
struct netlbl_domaddr_map {
struct list_head list4;
struct list_head list6;
};
struct netlbl_dom_map {
char *domain;
u32 type;
union {
struct cipso_v4_doi *cipsov4;
struct netlbl_domaddr_map *addrsel;
} type_def;
u32 valid;
struct list_head list;
struct rcu_head rcu;
};
/* init function */
int netlbl_domhsh_init(u32 size);
/* Manipulate the domain hash table */
int netlbl_domhsh_add(struct netlbl_dom_map *entry,
struct netlbl_audit *audit_info);
int netlbl_domhsh_add_default(struct netlbl_dom_map *entry,
struct netlbl_audit *audit_info);
int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry,
struct netlbl_audit *audit_info);
int netlbl_domhsh_remove_af4(const char *domain,
const struct in_addr *addr,
const struct in_addr *mask,
struct netlbl_audit *audit_info);
int netlbl_domhsh_remove(const char *domain, struct netlbl_audit *audit_info);
int netlbl_domhsh_remove_default(struct netlbl_audit *audit_info);
struct netlbl_dom_map *netlbl_domhsh_getentry(const char *domain);
struct netlbl_domaddr4_map *netlbl_domhsh_getentry_af4(const char *domain,
__be32 addr);
int netlbl_domhsh_walk(u32 *skip_bkt,
u32 *skip_chain,
int (*callback) (struct netlbl_dom_map *entry, void *arg),
void *cb_arg);
#if IS_ENABLED(CONFIG_IPV6)
struct netlbl_domaddr6_map *netlbl_domhsh_getentry_af6(const char *domain,
const struct in6_addr *addr);
#endif /* IPv6 */
#endif
