232 lines
6.3 KiB
C
232 lines
6.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* NetLabel Unlabeled Support
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*
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* This file defines functions for dealing with unlabeled packets for the
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* NetLabel system. The NetLabel system manages static and dynamic label
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* mappings for network protocols such as CIPSO and RIPSO.
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*
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* Author: Paul Moore <paul@paul-moore.com>
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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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#ifndef _NETLABEL_UNLABELED_H
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#define _NETLABEL_UNLABELED_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 Unlabeled subsystem.
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*
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* o STATICADD
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* This message is sent from an application to add a new static label for
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* incoming unlabeled connections.
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*
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* Required attributes:
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*
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* NLBL_UNLABEL_A_IFACE
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* NLBL_UNLABEL_A_SECCTX
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*
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* If IPv4 is specified the following attributes are required:
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*
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* NLBL_UNLABEL_A_IPV4ADDR
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* NLBL_UNLABEL_A_IPV4MASK
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*
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* If IPv6 is specified the following attributes are required:
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*
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* NLBL_UNLABEL_A_IPV6ADDR
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* NLBL_UNLABEL_A_IPV6MASK
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*
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* o STATICREMOVE
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* This message is sent from an application to remove an existing static
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* label for incoming unlabeled connections.
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*
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* Required attributes:
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*
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* NLBL_UNLABEL_A_IFACE
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*
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* If IPv4 is specified the following attributes are required:
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*
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* NLBL_UNLABEL_A_IPV4ADDR
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* NLBL_UNLABEL_A_IPV4MASK
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*
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* If IPv6 is specified the following attributes are required:
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*
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* NLBL_UNLABEL_A_IPV6ADDR
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* NLBL_UNLABEL_A_IPV6MASK
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*
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* o STATICLIST
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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 STATICLIST 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 response 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_UNLABEL_A_IFACE
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* NLBL_UNLABEL_A_SECCTX
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*
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* If IPv4 is specified the following attributes are required:
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*
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* NLBL_UNLABEL_A_IPV4ADDR
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* NLBL_UNLABEL_A_IPV4MASK
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*
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* If IPv6 is specified the following attributes are required:
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*
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* NLBL_UNLABEL_A_IPV6ADDR
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* NLBL_UNLABEL_A_IPV6MASK
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*
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* o STATICADDDEF
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* This message is sent from an application to set the default static
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* label for incoming unlabeled connections.
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*
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* Required attribute:
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*
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* NLBL_UNLABEL_A_SECCTX
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*
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* If IPv4 is specified the following attributes are required:
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*
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* NLBL_UNLABEL_A_IPV4ADDR
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* NLBL_UNLABEL_A_IPV4MASK
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*
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* If IPv6 is specified the following attributes are required:
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*
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* NLBL_UNLABEL_A_IPV6ADDR
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* NLBL_UNLABEL_A_IPV6MASK
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*
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* o STATICREMOVEDEF
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* This message is sent from an application to remove the existing default
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* static label for incoming unlabeled connections.
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*
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* If IPv4 is specified the following attributes are required:
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*
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* NLBL_UNLABEL_A_IPV4ADDR
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* NLBL_UNLABEL_A_IPV4MASK
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*
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* If IPv6 is specified the following attributes are required:
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*
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* NLBL_UNLABEL_A_IPV6ADDR
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* NLBL_UNLABEL_A_IPV6MASK
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*
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* o STATICLISTDEF
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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 STATICLISTDEF message. When sent by
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* an application there is no payload and the NLM_F_DUMP flag should be set.
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* The kernel should response with the following message.
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*
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* Required attribute:
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*
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* NLBL_UNLABEL_A_SECCTX
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*
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* If IPv4 is specified the following attributes are required:
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*
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* NLBL_UNLABEL_A_IPV4ADDR
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* NLBL_UNLABEL_A_IPV4MASK
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*
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* If IPv6 is specified the following attributes are required:
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*
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* NLBL_UNLABEL_A_IPV6ADDR
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* NLBL_UNLABEL_A_IPV6MASK
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*
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* o ACCEPT
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* This message is sent from an application to specify if the kernel should
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* allow unlabled packets to pass if they do not match any of the static
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* mappings defined in the unlabeled module.
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*
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* Required attributes:
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*
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* NLBL_UNLABEL_A_ACPTFLG
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*
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* o LIST
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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 LIST message. When sent by an
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* application there is no payload. The kernel should respond to a LIST
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* message with a LIST message on success.
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*
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* Required attributes:
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*
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* NLBL_UNLABEL_A_ACPTFLG
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*
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*/
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/* NetLabel Unlabeled commands */
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enum {
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NLBL_UNLABEL_C_UNSPEC,
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NLBL_UNLABEL_C_ACCEPT,
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NLBL_UNLABEL_C_LIST,
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NLBL_UNLABEL_C_STATICADD,
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NLBL_UNLABEL_C_STATICREMOVE,
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NLBL_UNLABEL_C_STATICLIST,
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NLBL_UNLABEL_C_STATICADDDEF,
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NLBL_UNLABEL_C_STATICREMOVEDEF,
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NLBL_UNLABEL_C_STATICLISTDEF,
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__NLBL_UNLABEL_C_MAX,
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};
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/* NetLabel Unlabeled attributes */
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enum {
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NLBL_UNLABEL_A_UNSPEC,
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NLBL_UNLABEL_A_ACPTFLG,
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/* (NLA_U8)
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* if true then unlabeled packets are allowed to pass, else unlabeled
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* packets are rejected */
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NLBL_UNLABEL_A_IPV6ADDR,
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/* (NLA_BINARY, struct in6_addr)
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* an IPv6 address */
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NLBL_UNLABEL_A_IPV6MASK,
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/* (NLA_BINARY, struct in6_addr)
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* an IPv6 address mask */
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NLBL_UNLABEL_A_IPV4ADDR,
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/* (NLA_BINARY, struct in_addr)
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* an IPv4 address */
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NLBL_UNLABEL_A_IPV4MASK,
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/* (NLA_BINARY, struct in_addr)
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* and IPv4 address mask */
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NLBL_UNLABEL_A_IFACE,
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/* (NLA_NULL_STRING)
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* network interface */
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NLBL_UNLABEL_A_SECCTX,
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/* (NLA_BINARY)
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* a LSM specific security context */
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__NLBL_UNLABEL_A_MAX,
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};
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#define NLBL_UNLABEL_A_MAX (__NLBL_UNLABEL_A_MAX - 1)
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/* NetLabel protocol functions */
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int netlbl_unlabel_genl_init(void);
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/* Unlabeled connection hash table size */
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/* XXX - currently this number is an uneducated guess */
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#define NETLBL_UNLHSH_BITSIZE 7
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/* General Unlabeled init function */
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int netlbl_unlabel_init(u32 size);
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/* Static/Fallback label management functions */
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int netlbl_unlhsh_add(struct net *net,
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const char *dev_name,
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const void *addr,
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const void *mask,
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u32 addr_len,
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u32 secid,
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struct netlbl_audit *audit_info);
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int netlbl_unlhsh_remove(struct net *net,
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const char *dev_name,
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const void *addr,
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const void *mask,
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u32 addr_len,
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struct netlbl_audit *audit_info);
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/* Process Unlabeled incoming network packets */
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int netlbl_unlabel_getattr(const struct sk_buff *skb,
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u16 family,
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struct netlbl_lsm_secattr *secattr);
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/* Set the default configuration to allow Unlabeled packets */
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int netlbl_unlabel_defconf(void);
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#endif
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