1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
/*
* 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
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#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
|
