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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* NetLabel Unlabeled Support
*
* This file defines functions for dealing with unlabeled packets for the
* NetLabel system. The NetLabel system manages static and dynamic label
* mappings for network protocols such as CIPSO and RIPSO.
*
* Author: Paul Moore <paul@paul-moore.com>
*/
/*
* (c) Copyright Hewlett-Packard Development Company, L.P., 2006
*/
#ifndef _NETLABEL_UNLABELED_H
#define _NETLABEL_UNLABELED_H
#include <net/netlabel.h>
/*
* The following NetLabel payloads are supported by the Unlabeled subsystem.
*
* o STATICADD
* This message is sent from an application to add a new static label for
* incoming unlabeled connections.
*
* Required attributes:
*
* NLBL_UNLABEL_A_IFACE
* NLBL_UNLABEL_A_SECCTX
*
* If IPv4 is specified the following attributes are required:
*
* NLBL_UNLABEL_A_IPV4ADDR
* NLBL_UNLABEL_A_IPV4MASK
*
* If IPv6 is specified the following attributes are required:
*
* NLBL_UNLABEL_A_IPV6ADDR
* NLBL_UNLABEL_A_IPV6MASK
*
* o STATICREMOVE
* This message is sent from an application to remove an existing static
* label for incoming unlabeled connections.
*
* Required attributes:
*
* NLBL_UNLABEL_A_IFACE
*
* If IPv4 is specified the following attributes are required:
*
* NLBL_UNLABEL_A_IPV4ADDR
* NLBL_UNLABEL_A_IPV4MASK
*
* If IPv6 is specified the following attributes are required:
*
* NLBL_UNLABEL_A_IPV6ADDR
* NLBL_UNLABEL_A_IPV6MASK
*
* o STATICLIST
* This message can be sent either from an application or by the kernel in
* response to an application generated STATICLIST message. When sent by an
* application there is no payload and the NLM_F_DUMP flag should be set.
* The kernel should response with a series of the following messages.
*
* Required attributes:
*
* NLBL_UNLABEL_A_IFACE
* NLBL_UNLABEL_A_SECCTX
*
* If IPv4 is specified the following attributes are required:
*
* NLBL_UNLABEL_A_IPV4ADDR
* NLBL_UNLABEL_A_IPV4MASK
*
* If IPv6 is specified the following attributes are required:
*
* NLBL_UNLABEL_A_IPV6ADDR
* NLBL_UNLABEL_A_IPV6MASK
*
* o STATICADDDEF
* This message is sent from an application to set the default static
* label for incoming unlabeled connections.
*
* Required attribute:
*
* NLBL_UNLABEL_A_SECCTX
*
* If IPv4 is specified the following attributes are required:
*
* NLBL_UNLABEL_A_IPV4ADDR
* NLBL_UNLABEL_A_IPV4MASK
*
* If IPv6 is specified the following attributes are required:
*
* NLBL_UNLABEL_A_IPV6ADDR
* NLBL_UNLABEL_A_IPV6MASK
*
* o STATICREMOVEDEF
* This message is sent from an application to remove the existing default
* static label for incoming unlabeled connections.
*
* If IPv4 is specified the following attributes are required:
*
* NLBL_UNLABEL_A_IPV4ADDR
* NLBL_UNLABEL_A_IPV4MASK
*
* If IPv6 is specified the following attributes are required:
*
* NLBL_UNLABEL_A_IPV6ADDR
* NLBL_UNLABEL_A_IPV6MASK
*
* o STATICLISTDEF
* This message can be sent either from an application or by the kernel in
* response to an application generated STATICLISTDEF message. When sent by
* an application there is no payload and the NLM_F_DUMP flag should be set.
* The kernel should response with the following message.
*
* Required attribute:
*
* NLBL_UNLABEL_A_SECCTX
*
* If IPv4 is specified the following attributes are required:
*
* NLBL_UNLABEL_A_IPV4ADDR
* NLBL_UNLABEL_A_IPV4MASK
*
* If IPv6 is specified the following attributes are required:
*
* NLBL_UNLABEL_A_IPV6ADDR
* NLBL_UNLABEL_A_IPV6MASK
*
* o ACCEPT
* This message is sent from an application to specify if the kernel should
* allow unlabled packets to pass if they do not match any of the static
* mappings defined in the unlabeled module.
*
* Required attributes:
*
* NLBL_UNLABEL_A_ACPTFLG
*
* o LIST
* This message can be sent either from an application or by the kernel in
* response to an application generated LIST message. When sent by an
* application there is no payload. The kernel should respond to a LIST
* message with a LIST message on success.
*
* Required attributes:
*
* NLBL_UNLABEL_A_ACPTFLG
*
*/
/* NetLabel Unlabeled commands */
enum {
NLBL_UNLABEL_C_UNSPEC,
NLBL_UNLABEL_C_ACCEPT,
NLBL_UNLABEL_C_LIST,
NLBL_UNLABEL_C_STATICADD,
NLBL_UNLABEL_C_STATICREMOVE,
NLBL_UNLABEL_C_STATICLIST,
NLBL_UNLABEL_C_STATICADDDEF,
NLBL_UNLABEL_C_STATICREMOVEDEF,
NLBL_UNLABEL_C_STATICLISTDEF,
__NLBL_UNLABEL_C_MAX,
};
/* NetLabel Unlabeled attributes */
enum {
NLBL_UNLABEL_A_UNSPEC,
NLBL_UNLABEL_A_ACPTFLG,
/* (NLA_U8)
* if true then unlabeled packets are allowed to pass, else unlabeled
* packets are rejected */
NLBL_UNLABEL_A_IPV6ADDR,
/* (NLA_BINARY, struct in6_addr)
* an IPv6 address */
NLBL_UNLABEL_A_IPV6MASK,
/* (NLA_BINARY, struct in6_addr)
* an IPv6 address mask */
NLBL_UNLABEL_A_IPV4ADDR,
/* (NLA_BINARY, struct in_addr)
* an IPv4 address */
NLBL_UNLABEL_A_IPV4MASK,
/* (NLA_BINARY, struct in_addr)
* and IPv4 address mask */
NLBL_UNLABEL_A_IFACE,
/* (NLA_NULL_STRING)
* network interface */
NLBL_UNLABEL_A_SECCTX,
/* (NLA_BINARY)
* a LSM specific security context */
__NLBL_UNLABEL_A_MAX,
};
#define NLBL_UNLABEL_A_MAX (__NLBL_UNLABEL_A_MAX - 1)
/* NetLabel protocol functions */
int netlbl_unlabel_genl_init(void);
/* Unlabeled connection hash table size */
/* XXX - currently this number is an uneducated guess */
#define NETLBL_UNLHSH_BITSIZE 7
/* General Unlabeled init function */
int netlbl_unlabel_init(u32 size);
/* Static/Fallback label management functions */
int netlbl_unlhsh_add(struct net *net,
const char *dev_name,
const void *addr,
const void *mask,
u32 addr_len,
u32 secid,
struct netlbl_audit *audit_info);
int netlbl_unlhsh_remove(struct net *net,
const char *dev_name,
const void *addr,
const void *mask,
u32 addr_len,
struct netlbl_audit *audit_info);
/* Process Unlabeled incoming network packets */
int netlbl_unlabel_getattr(const struct sk_buff *skb,
u16 family,
struct netlbl_lsm_secattr *secattr);
/* Set the default configuration to allow Unlabeled packets */
int netlbl_unlabel_defconf(void);
#endif
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