LXR linux/net/netlabel/netlabel

   1/*
   2 * NetLabel Domain Hash Table
   3 *
   4 * This file manages the domain hash table that NetLabel uses to determine
   5 * which network labeling protocol to use for a given domain.  The NetLabel
   6 * system manages static and dynamic label mappings for network protocols such
   7 * as CIPSO and RIPSO.
   8 *
   9 * Author: Paul Moore <paul@paul-moore.com>
  10 *
  11 */
  12
  13/*
  14 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008
  15 *
  16 * This program is free software;  you can redistribute it and/or modify
  17 * it under the terms of the GNU General Public License as published by
  18 * the Free Software Foundation; either version 2 of the License, or
  19 * (at your option) any later version.
  20 *
  21 * This program is distributed in the hope that it will be useful,
  22 * but WITHOUT ANY WARRANTY;  without even the implied warranty of
  23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  24 * the GNU General Public License for more details.
  25 *
  26 * You should have received a copy of the GNU General Public License
  27 * along with this program;  if not, see <http://www.gnu.org/licenses/>.
  28 *
  29 */
  30
  31#ifndef _NETLABEL_DOMAINHASH_H
  32#define _NETLABEL_DOMAINHASH_H
  33
  34#include <linux/types.h>
  35#include <linux/rcupdate.h>
  36#include <linux/list.h>
  37
  38#include "netlabel_addrlist.h"
  39
  40/* Domain hash table size */
  41/* XXX - currently this number is an uneducated guess */
  42#define NETLBL_DOMHSH_BITSIZE       7
  43
  44/* Domain mapping definition structures */
  45struct netlbl_domaddr_map {
  46        struct list_head list4;
  47        struct list_head list6;
  48};
  49struct netlbl_dommap_def {
  50        u32 type;
  51        union {
  52                struct netlbl_domaddr_map *addrsel;
  53                struct cipso_v4_doi *cipso;
  54                struct calipso_doi *calipso;
  55        };
  56};
  57#define netlbl_domhsh_addr4_entry(iter) \
  58        container_of(iter, struct netlbl_domaddr4_map, list)
  59struct netlbl_domaddr4_map {
  60        struct netlbl_dommap_def def;
  61
  62        struct netlbl_af4list list;
  63};
  64#define netlbl_domhsh_addr6_entry(iter) \
  65        container_of(iter, struct netlbl_domaddr6_map, list)
  66struct netlbl_domaddr6_map {
  67        struct netlbl_dommap_def def;
  68
  69        struct netlbl_af6list list;
  70};
  71
  72struct netlbl_dom_map {
  73        char *domain;
  74        u16 family;
  75        struct netlbl_dommap_def def;
  76
  77        u32 valid;
  78        struct list_head list;
  79        struct rcu_head rcu;
  80};
  81
  82/* init function */
  83int netlbl_domhsh_init(u32 size);
  84
  85/* Manipulate the domain hash table */
  86int netlbl_domhsh_add(struct netlbl_dom_map *entry,
  87                      struct netlbl_audit *audit_info);
  88int netlbl_domhsh_add_default(struct netlbl_dom_map *entry,
  89                              struct netlbl_audit *audit_info);
  90int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry,
  91                               struct netlbl_audit *audit_info);
  92int netlbl_domhsh_remove_af4(const char *domain,
  93                             const struct in_addr *addr,
  94                             const struct in_addr *mask,
  95                             struct netlbl_audit *audit_info);
  96int netlbl_domhsh_remove_af6(const char *domain,
  97                             const struct in6_addr *addr,
  98                             const struct in6_addr *mask,
  99                             struct netlbl_audit *audit_info);
 100int netlbl_domhsh_remove(const char *domain, u16 family,
 101                         struct netlbl_audit *audit_info);
 102int netlbl_domhsh_remove_default(u16 family, struct netlbl_audit *audit_info);
 103struct netlbl_dom_map *netlbl_domhsh_getentry(const char *domain, u16 family);
 104struct netlbl_dommap_def *netlbl_domhsh_getentry_af4(const char *domain,
 105                                                     __be32 addr);
 106#if IS_ENABLED(CONFIG_IPV6)
 107struct netlbl_dommap_def *netlbl_domhsh_getentry_af6(const char *domain,
 108                                                   const struct in6_addr *addr);
 109int netlbl_domhsh_remove_af6(const char *domain,
 110                             const struct in6_addr *addr,
 111                             const struct in6_addr *mask,
 112                             struct netlbl_audit *audit_info);
 113#endif /* IPv6 */
 114
 115int netlbl_domhsh_walk(u32 *skip_bkt,
 116                     u32 *skip_chain,
 117                     int (*callback) (struct netlbl_dom_map *entry, void *arg),
 118                     void *cb_arg);
 119
 120#endif
 121