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217 lines
7.7 KiB
217 lines
7.7 KiB
/*
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* NetLabel CIPSO/IPv4 Support
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*
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* This file defines the CIPSO/IPv4 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_CIPSO_V4
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#define _NETLABEL_CIPSO_V4
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#include <net/netlabel.h>
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/*
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* The following NetLabel payloads are supported by the CIPSO subsystem, all
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* of which are preceeded by the nlmsghdr struct.
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*
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* o ACK:
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* Sent by the kernel in response to an applications message, applications
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* should never send this message.
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*
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* +----------------------+-----------------------+
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* | seq number (32 bits) | return code (32 bits) |
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* +----------------------+-----------------------+
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*
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* seq number: the sequence number of the original message, taken from the
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* nlmsghdr structure
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* return code: return value, based on errno values
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*
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* o ADD:
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* Sent by an application to add a new DOI mapping table, after completion
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* of the task the kernel should ACK this message.
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*
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* +---------------+--------------------+---------------------+
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* | DOI (32 bits) | map type (32 bits) | tag count (32 bits) | ...
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* +---------------+--------------------+---------------------+
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*
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* +-----------------+
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* | tag #X (8 bits) | ... repeated
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* +-----------------+
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*
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* +-------------- ---- --- -- -
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* | mapping data
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* +-------------- ---- --- -- -
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*
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* DOI: the DOI value
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* map type: the mapping table type (defined in the cipso_ipv4.h header
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* as CIPSO_V4_MAP_*)
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* tag count: the number of tags, must be greater than zero
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* tag: the CIPSO tag for the DOI, tags listed first are given
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* higher priorirty when sending packets
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* mapping data: specific to the map type (see below)
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*
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* CIPSO_V4_MAP_STD
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*
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* +------------------+-----------------------+----------------------+
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* | levels (32 bits) | max l level (32 bits) | max r level (8 bits) | ...
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* +------------------+-----------------------+----------------------+
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*
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* +----------------------+---------------------+---------------------+
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* | categories (32 bits) | max l cat (32 bits) | max r cat (16 bits) | ...
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* +----------------------+---------------------+---------------------+
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*
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* +--------------------------+-------------------------+
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* | local level #X (32 bits) | CIPSO level #X (8 bits) | ... repeated
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* +--------------------------+-------------------------+
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*
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* +-----------------------------+-----------------------------+
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* | local category #X (32 bits) | CIPSO category #X (16 bits) | ... repeated
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* +-----------------------------+-----------------------------+
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*
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* levels: the number of level mappings
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* max l level: the highest local level
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* max r level: the highest remote/CIPSO level
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* categories: the number of category mappings
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* max l cat: the highest local category
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* max r cat: the highest remote/CIPSO category
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* local level: the local part of a level mapping
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* CIPSO level: the remote/CIPSO part of a level mapping
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* local category: the local part of a category mapping
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* CIPSO category: the remote/CIPSO part of a category mapping
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*
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* CIPSO_V4_MAP_PASS
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*
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* No mapping data is needed for this map type.
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*
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* o REMOVE:
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* Sent by an application to remove a specific DOI mapping table from the
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* CIPSO V4 system. The kernel should ACK this message.
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*
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* +---------------+
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* | DOI (32 bits) |
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* +---------------+
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*
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* DOI: the DOI value
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*
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* o LIST:
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* Sent by an application to list the details of a DOI definition. The
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* kernel should send an ACK on error or a response as indicated below. The
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* application generated message format is shown below.
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*
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* +---------------+
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* | DOI (32 bits) |
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* +---------------+
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*
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* DOI: the DOI value
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*
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* The valid response message format depends on the type of the DOI mapping,
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* the known formats are shown below.
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*
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* +--------------------+
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* | map type (32 bits) | ...
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* +--------------------+
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*
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* map type: the DOI mapping table type (defined in the cipso_ipv4.h
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* header as CIPSO_V4_MAP_*)
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*
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* (map type == CIPSO_V4_MAP_STD)
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*
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* +----------------+------------------+----------------------+
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* | tags (32 bits) | levels (32 bits) | categories (32 bits) | ...
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* +----------------+------------------+----------------------+
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*
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* +-----------------+
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* | tag #X (8 bits) | ... repeated
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* +-----------------+
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*
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* +--------------------------+-------------------------+
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* | local level #X (32 bits) | CIPSO level #X (8 bits) | ... repeated
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* +--------------------------+-------------------------+
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*
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* +-----------------------------+-----------------------------+
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* | local category #X (32 bits) | CIPSO category #X (16 bits) | ... repeated
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* +-----------------------------+-----------------------------+
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*
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* tags: the number of CIPSO tag types
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* levels: the number of level mappings
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* categories: the number of category mappings
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* tag: the tag number, tags listed first are given higher
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* priority when sending packets
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* local level: the local part of a level mapping
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* CIPSO level: the remote/CIPSO part of a level mapping
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* local category: the local part of a category mapping
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* CIPSO category: the remote/CIPSO part of a category mapping
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*
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* (map type == CIPSO_V4_MAP_PASS)
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*
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* +----------------+
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* | tags (32 bits) | ...
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* +----------------+
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*
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* +-----------------+
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* | tag #X (8 bits) | ... repeated
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* +-----------------+
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*
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* tags: the number of CIPSO tag types
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* tag: the tag number, tags listed first are given higher
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* priority when sending packets
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*
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* o LISTALL:
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* This message is sent by an application to list the valid DOIs on the
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* system. There is no payload and the kernel should respond with an ACK
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* or the following message.
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*
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* +---------------------+------------------+-----------------------+
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* | DOI count (32 bits) | DOI #X (32 bits) | map type #X (32 bits) |
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* +---------------------+------------------+-----------------------+
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*
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* +-----------------------+
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* | map type #X (32 bits) | ...
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* +-----------------------+
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*
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* DOI count: the number of DOIs
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* DOI: the DOI value
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* map type: the DOI mapping table type (defined in the cipso_ipv4.h
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* header as CIPSO_V4_MAP_*)
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*
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*/
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/* NetLabel CIPSOv4 commands */
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enum {
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NLBL_CIPSOV4_C_UNSPEC,
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NLBL_CIPSOV4_C_ACK,
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NLBL_CIPSOV4_C_ADD,
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NLBL_CIPSOV4_C_REMOVE,
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NLBL_CIPSOV4_C_LIST,
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NLBL_CIPSOV4_C_LISTALL,
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__NLBL_CIPSOV4_C_MAX,
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};
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#define NLBL_CIPSOV4_C_MAX (__NLBL_CIPSOV4_C_MAX - 1)
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/* NetLabel protocol functions */
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int netlbl_cipsov4_genl_init(void);
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#endif
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