Quellcode-Bibliothek netlabel_unlabeled.h
Sprache: C
/* 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
*/
/* * 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 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, constchar *dev_name, constvoid *addr, constvoid *mask,
u32 addr_len,
u32 secid, struct netlbl_audit *audit_info); int netlbl_unlhsh_remove(struct net *net, constchar *dev_name, constvoid *addr, constvoid *mask,
u32 addr_len, struct netlbl_audit *audit_info);
/* Process Unlabeled incoming network packets */ int netlbl_unlabel_getattr(conststruct 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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