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63c4168874
This patch extends the NetLabel traffic labeling capabilities to individual packets based not only on the LSM domain but the by the destination address as well. The changes here only affect the core NetLabel infrastructre, changes to the NetLabel KAPI and individial protocol engines are also required but are split out into a different patch to ease review. Signed-off-by: Paul Moore <paul.moore@hp.com> Reviewed-by: James Morris <jmorris@namei.org>
109 lines
3.3 KiB
C
109 lines
3.3 KiB
C
/*
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* NetLabel Domain Hash Table
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*
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* This file manages the domain hash table that NetLabel uses to determine
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* which network labeling protocol to use for a given domain. The NetLabel
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* system manages static and dynamic label mappings for network protocols such
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* as CIPSO and RIPSO.
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*
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* Author: Paul Moore <paul.moore@hp.com>
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*
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*/
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/*
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* (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef _NETLABEL_DOMAINHASH_H
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#define _NETLABEL_DOMAINHASH_H
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#include <linux/types.h>
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#include <linux/rcupdate.h>
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#include <linux/list.h>
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#include "netlabel_addrlist.h"
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/* Domain hash table size */
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/* XXX - currently this number is an uneducated guess */
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#define NETLBL_DOMHSH_BITSIZE 7
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/* Domain mapping definition structures */
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#define netlbl_domhsh_addr4_entry(iter) \
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container_of(iter, struct netlbl_domaddr4_map, list)
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struct netlbl_domaddr4_map {
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u32 type;
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union {
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struct cipso_v4_doi *cipsov4;
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} type_def;
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struct netlbl_af4list list;
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};
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#define netlbl_domhsh_addr6_entry(iter) \
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container_of(iter, struct netlbl_domaddr6_map, list)
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struct netlbl_domaddr6_map {
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u32 type;
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/* NOTE: no 'type_def' union needed at present since we don't currently
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* support any IPv6 labeling protocols */
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struct netlbl_af6list list;
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};
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struct netlbl_domaddr_map {
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struct list_head list4;
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struct list_head list6;
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};
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struct netlbl_dom_map {
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char *domain;
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u32 type;
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union {
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struct cipso_v4_doi *cipsov4;
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struct netlbl_domaddr_map *addrsel;
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} type_def;
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u32 valid;
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struct list_head list;
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struct rcu_head rcu;
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};
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/* init function */
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int netlbl_domhsh_init(u32 size);
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/* Manipulate the domain hash table */
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int netlbl_domhsh_add(struct netlbl_dom_map *entry,
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struct netlbl_audit *audit_info);
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int netlbl_domhsh_add_default(struct netlbl_dom_map *entry,
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struct netlbl_audit *audit_info);
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int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry,
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struct netlbl_audit *audit_info);
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int netlbl_domhsh_remove(const char *domain, struct netlbl_audit *audit_info);
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int netlbl_domhsh_remove_default(struct netlbl_audit *audit_info);
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struct netlbl_dom_map *netlbl_domhsh_getentry(const char *domain);
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struct netlbl_domaddr4_map *netlbl_domhsh_getentry_af4(const char *domain,
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__be32 addr);
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int netlbl_domhsh_walk(u32 *skip_bkt,
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u32 *skip_chain,
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int (*callback) (struct netlbl_dom_map *entry, void *arg),
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void *cb_arg);
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#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
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struct netlbl_domaddr6_map *netlbl_domhsh_getentry_af6(const char *domain,
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const struct in6_addr *addr);
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#endif /* IPv6 */
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#endif
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