23bcdc1ade
Create a new NetLabel KAPI interface, netlbl_enabled(), which reports on the current runtime status of NetLabel based on the existing configuration. LSMs that make use of NetLabel, i.e. SELinux, can use this new function to determine if they should perform NetLabel access checks. This patch changes the NetLabel/SELinux glue code such that SELinux only enforces NetLabel related access checks when netlbl_enabled() returns true. At present NetLabel is considered to be enabled when there is at least one labeled protocol configuration present. The result is that by default NetLabel is considered to be disabled, however, as soon as an administrator configured a CIPSO DOI definition NetLabel is enabled and SELinux starts enforcing NetLabel related access controls - including unlabeled packet controls. This patch also tries to consolidate the multiple "#ifdef CONFIG_NETLABEL" blocks into a single block to ease future review as recommended by Linus. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
176 lines
4.9 KiB
C
176 lines
4.9 KiB
C
/*
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* NetLabel Management Support
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*
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* This file defines the management functions for the NetLabel system. The
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* NetLabel system manages static and dynamic label mappings for network
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* protocols such 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
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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_MGMT_H
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#define _NETLABEL_MGMT_H
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#include <net/netlabel.h>
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/*
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* The following NetLabel payloads are supported by the management interface.
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*
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* o ADD:
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* Sent by an application to add a domain mapping to the NetLabel system.
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*
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* Required attributes:
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*
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* NLBL_MGMT_A_DOMAIN
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* NLBL_MGMT_A_PROTOCOL
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*
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* If using NETLBL_NLTYPE_CIPSOV4 the following attributes are required:
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*
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* NLBL_MGMT_A_CV4DOI
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*
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* If using NETLBL_NLTYPE_UNLABELED no other attributes are required.
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*
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* o REMOVE:
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* Sent by an application to remove a domain mapping from the NetLabel
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* system.
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*
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* Required attributes:
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*
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* NLBL_MGMT_A_DOMAIN
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*
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* o LISTALL:
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* This message can be sent either from an application or by the kernel in
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* response to an application generated LISTALL message. When sent by an
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* application there is no payload and the NLM_F_DUMP flag should be set.
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* The kernel should respond with a series of the following messages.
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*
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* Required attributes:
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*
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* NLBL_MGMT_A_DOMAIN
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* NLBL_MGMT_A_PROTOCOL
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*
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* If using NETLBL_NLTYPE_CIPSOV4 the following attributes are required:
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*
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* NLBL_MGMT_A_CV4DOI
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*
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* If using NETLBL_NLTYPE_UNLABELED no other attributes are required.
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*
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* o ADDDEF:
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* Sent by an application to set the default domain mapping for the NetLabel
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* system.
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*
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* Required attributes:
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*
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* NLBL_MGMT_A_PROTOCOL
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*
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* If using NETLBL_NLTYPE_CIPSOV4 the following attributes are required:
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*
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* NLBL_MGMT_A_CV4DOI
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*
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* If using NETLBL_NLTYPE_UNLABELED no other attributes are required.
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*
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* o REMOVEDEF:
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* Sent by an application to remove the default domain mapping from the
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* NetLabel system, there is no payload.
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*
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* o LISTDEF:
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* This message can be sent either from an application or by the kernel in
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* response to an application generated LISTDEF message. When sent by an
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* application there is no payload. On success the kernel should send a
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* response using the following format.
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*
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* Required attributes:
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*
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* NLBL_MGMT_A_PROTOCOL
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*
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* If using NETLBL_NLTYPE_CIPSOV4 the following attributes are required:
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*
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* NLBL_MGMT_A_CV4DOI
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*
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* If using NETLBL_NLTYPE_UNLABELED no other attributes are required.
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*
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* o PROTOCOLS:
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* Sent by an application to request a list of configured NetLabel protocols
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* in the kernel. When sent by an application there is no payload and the
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* NLM_F_DUMP flag should be set. The kernel should respond with a series of
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* the following messages.
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*
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* Required attributes:
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*
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* NLBL_MGMT_A_PROTOCOL
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*
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* o VERSION:
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* Sent by an application to request the NetLabel version. When sent by an
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* application there is no payload. This message type is also used by the
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* kernel to respond to an VERSION request.
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*
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* Required attributes:
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*
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* NLBL_MGMT_A_VERSION
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*
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*/
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/* NetLabel Management commands */
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enum {
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NLBL_MGMT_C_UNSPEC,
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NLBL_MGMT_C_ADD,
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NLBL_MGMT_C_REMOVE,
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NLBL_MGMT_C_LISTALL,
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NLBL_MGMT_C_ADDDEF,
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NLBL_MGMT_C_REMOVEDEF,
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NLBL_MGMT_C_LISTDEF,
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NLBL_MGMT_C_PROTOCOLS,
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NLBL_MGMT_C_VERSION,
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__NLBL_MGMT_C_MAX,
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};
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#define NLBL_MGMT_C_MAX (__NLBL_MGMT_C_MAX - 1)
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/* NetLabel Management attributes */
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enum {
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NLBL_MGMT_A_UNSPEC,
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NLBL_MGMT_A_DOMAIN,
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/* (NLA_NUL_STRING)
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* the NULL terminated LSM domain string */
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NLBL_MGMT_A_PROTOCOL,
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/* (NLA_U32)
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* the NetLabel protocol type (defined by NETLBL_NLTYPE_*) */
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NLBL_MGMT_A_VERSION,
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/* (NLA_U32)
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* the NetLabel protocol version number (defined by
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* NETLBL_PROTO_VERSION) */
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NLBL_MGMT_A_CV4DOI,
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/* (NLA_U32)
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* the CIPSOv4 DOI value */
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__NLBL_MGMT_A_MAX,
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};
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#define NLBL_MGMT_A_MAX (__NLBL_MGMT_A_MAX - 1)
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/* NetLabel protocol functions */
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int netlbl_mgmt_genl_init(void);
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/* NetLabel misc management functions */
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void netlbl_mgmt_protocount_inc(void);
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void netlbl_mgmt_protocount_dec(void);
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u32 netlbl_mgmt_protocount_value(void);
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#endif
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