2 * NetLabel Unlabeled Support
4 * This file defines functions for dealing with unlabeled packets for the
5 * NetLabel system. The NetLabel system manages static and dynamic label
6 * mappings for network protocols such as CIPSO and RIPSO.
8 * Author: Paul Moore <paul@paul-moore.com>
13 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
23 * the GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, see <http://www.gnu.org/licenses/>.
30 #ifndef _NETLABEL_UNLABELED_H
31 #define _NETLABEL_UNLABELED_H
33 #include <net/netlabel.h>
36 * The following NetLabel payloads are supported by the Unlabeled subsystem.
39 * This message is sent from an application to add a new static label for
40 * incoming unlabeled connections.
42 * Required attributes:
44 * NLBL_UNLABEL_A_IFACE
45 * NLBL_UNLABEL_A_SECCTX
47 * If IPv4 is specified the following attributes are required:
49 * NLBL_UNLABEL_A_IPV4ADDR
50 * NLBL_UNLABEL_A_IPV4MASK
52 * If IPv6 is specified the following attributes are required:
54 * NLBL_UNLABEL_A_IPV6ADDR
55 * NLBL_UNLABEL_A_IPV6MASK
58 * This message is sent from an application to remove an existing static
59 * label for incoming unlabeled connections.
61 * Required attributes:
63 * NLBL_UNLABEL_A_IFACE
65 * If IPv4 is specified the following attributes are required:
67 * NLBL_UNLABEL_A_IPV4ADDR
68 * NLBL_UNLABEL_A_IPV4MASK
70 * If IPv6 is specified the following attributes are required:
72 * NLBL_UNLABEL_A_IPV6ADDR
73 * NLBL_UNLABEL_A_IPV6MASK
76 * This message can be sent either from an application or by the kernel in
77 * response to an application generated STATICLIST message. When sent by an
78 * application there is no payload and the NLM_F_DUMP flag should be set.
79 * The kernel should response with a series of the following messages.
81 * Required attributes:
83 * NLBL_UNLABEL_A_IFACE
84 * NLBL_UNLABEL_A_SECCTX
86 * If IPv4 is specified the following attributes are required:
88 * NLBL_UNLABEL_A_IPV4ADDR
89 * NLBL_UNLABEL_A_IPV4MASK
91 * If IPv6 is specified the following attributes are required:
93 * NLBL_UNLABEL_A_IPV6ADDR
94 * NLBL_UNLABEL_A_IPV6MASK
97 * This message is sent from an application to set the default static
98 * label for incoming unlabeled connections.
100 * Required attribute:
102 * NLBL_UNLABEL_A_SECCTX
104 * If IPv4 is specified the following attributes are required:
106 * NLBL_UNLABEL_A_IPV4ADDR
107 * NLBL_UNLABEL_A_IPV4MASK
109 * If IPv6 is specified the following attributes are required:
111 * NLBL_UNLABEL_A_IPV6ADDR
112 * NLBL_UNLABEL_A_IPV6MASK
115 * This message is sent from an application to remove the existing default
116 * static label for incoming unlabeled connections.
118 * If IPv4 is specified the following attributes are required:
120 * NLBL_UNLABEL_A_IPV4ADDR
121 * NLBL_UNLABEL_A_IPV4MASK
123 * If IPv6 is specified the following attributes are required:
125 * NLBL_UNLABEL_A_IPV6ADDR
126 * NLBL_UNLABEL_A_IPV6MASK
129 * This message can be sent either from an application or by the kernel in
130 * response to an application generated STATICLISTDEF message. When sent by
131 * an application there is no payload and the NLM_F_DUMP flag should be set.
132 * The kernel should response with the following message.
134 * Required attribute:
136 * NLBL_UNLABEL_A_SECCTX
138 * If IPv4 is specified the following attributes are required:
140 * NLBL_UNLABEL_A_IPV4ADDR
141 * NLBL_UNLABEL_A_IPV4MASK
143 * If IPv6 is specified the following attributes are required:
145 * NLBL_UNLABEL_A_IPV6ADDR
146 * NLBL_UNLABEL_A_IPV6MASK
149 * This message is sent from an application to specify if the kernel should
150 * allow unlabled packets to pass if they do not match any of the static
151 * mappings defined in the unlabeled module.
153 * Required attributes:
155 * NLBL_UNLABEL_A_ACPTFLG
158 * This message can be sent either from an application or by the kernel in
159 * response to an application generated LIST message. When sent by an
160 * application there is no payload. The kernel should respond to a LIST
161 * message with a LIST message on success.
163 * Required attributes:
165 * NLBL_UNLABEL_A_ACPTFLG
169 /* NetLabel Unlabeled commands */
171 NLBL_UNLABEL_C_UNSPEC,
172 NLBL_UNLABEL_C_ACCEPT,
174 NLBL_UNLABEL_C_STATICADD,
175 NLBL_UNLABEL_C_STATICREMOVE,
176 NLBL_UNLABEL_C_STATICLIST,
177 NLBL_UNLABEL_C_STATICADDDEF,
178 NLBL_UNLABEL_C_STATICREMOVEDEF,
179 NLBL_UNLABEL_C_STATICLISTDEF,
180 __NLBL_UNLABEL_C_MAX,
183 /* NetLabel Unlabeled attributes */
185 NLBL_UNLABEL_A_UNSPEC,
186 NLBL_UNLABEL_A_ACPTFLG,
188 * if true then unlabeled packets are allowed to pass, else unlabeled
189 * packets are rejected */
190 NLBL_UNLABEL_A_IPV6ADDR,
191 /* (NLA_BINARY, struct in6_addr)
193 NLBL_UNLABEL_A_IPV6MASK,
194 /* (NLA_BINARY, struct in6_addr)
195 * an IPv6 address mask */
196 NLBL_UNLABEL_A_IPV4ADDR,
197 /* (NLA_BINARY, struct in_addr)
199 NLBL_UNLABEL_A_IPV4MASK,
200 /* (NLA_BINARY, struct in_addr)
201 * and IPv4 address mask */
202 NLBL_UNLABEL_A_IFACE,
204 * network interface */
205 NLBL_UNLABEL_A_SECCTX,
207 * a LSM specific security context */
208 __NLBL_UNLABEL_A_MAX,
210 #define NLBL_UNLABEL_A_MAX (__NLBL_UNLABEL_A_MAX - 1)
212 /* NetLabel protocol functions */
213 int netlbl_unlabel_genl_init(void);
215 /* Unlabeled connection hash table size */
216 /* XXX - currently this number is an uneducated guess */
217 #define NETLBL_UNLHSH_BITSIZE 7
219 /* General Unlabeled init function */
220 int netlbl_unlabel_init(u32 size);
222 /* Static/Fallback label management functions */
223 int netlbl_unlhsh_add(struct net *net,
224 const char *dev_name,
229 struct netlbl_audit *audit_info);
230 int netlbl_unlhsh_remove(struct net *net,
231 const char *dev_name,
235 struct netlbl_audit *audit_info);
237 /* Process Unlabeled incoming network packets */
238 int netlbl_unlabel_getattr(const struct sk_buff *skb,
240 struct netlbl_lsm_secattr *secattr);
242 /* Set the default configuration to allow Unlabeled packets */
243 int netlbl_unlabel_defconf(void);