blob: eddc7b420109aac9c129dedfad67f680b6203e99 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Netlink message type permission tables, for user generated messages.
3 *
4 * Author: James Morris <jmorris@redhat.com>
5 *
6 * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2,
10 * as published by the Free Software Foundation.
11 */
12#include <linux/types.h>
13#include <linux/kernel.h>
14#include <linux/skbuff.h>
15#include <linux/netlink.h>
16#include <linux/rtnetlink.h>
17#include <linux/if.h>
18#include <linux/netfilter_ipv4/ip_queue.h>
James Morris216efaa2005-08-15 20:34:48 -070019#include <linux/inet_diag.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <linux/xfrm.h>
21#include <linux/audit.h>
22
23#include "flask.h"
24#include "av_permissions.h"
25
26struct nlmsg_perm
27{
28 u16 nlmsg_type;
29 u32 perm;
30};
31
32static struct nlmsg_perm nlmsg_route_perms[] =
33{
34 { RTM_NEWLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
35 { RTM_DELLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
36 { RTM_GETLINK, NETLINK_ROUTE_SOCKET__NLMSG_READ },
37 { RTM_SETLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
38 { RTM_NEWADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
39 { RTM_DELADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
40 { RTM_GETADDR, NETLINK_ROUTE_SOCKET__NLMSG_READ },
41 { RTM_NEWROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
42 { RTM_DELROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
43 { RTM_GETROUTE, NETLINK_ROUTE_SOCKET__NLMSG_READ },
44 { RTM_NEWNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
45 { RTM_DELNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
46 { RTM_GETNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_READ },
47 { RTM_NEWRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
48 { RTM_DELRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
49 { RTM_GETRULE, NETLINK_ROUTE_SOCKET__NLMSG_READ },
50 { RTM_NEWQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
51 { RTM_DELQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
52 { RTM_GETQDISC, NETLINK_ROUTE_SOCKET__NLMSG_READ },
53 { RTM_NEWTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
54 { RTM_DELTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
55 { RTM_GETTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_READ },
56 { RTM_NEWTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
57 { RTM_DELTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
58 { RTM_GETTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_READ },
59 { RTM_NEWACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
60 { RTM_DELACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
61 { RTM_GETACTION, NETLINK_ROUTE_SOCKET__NLMSG_READ },
62 { RTM_NEWPREFIX, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 { RTM_GETMULTICAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
64 { RTM_GETANYCAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
Thomas Grafc7fb64d2005-06-18 22:50:55 -070065 { RTM_GETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
66 { RTM_SETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
Linus Torvalds1da177e2005-04-16 15:20:36 -070067};
68
69static struct nlmsg_perm nlmsg_firewall_perms[] =
70{
71 { IPQM_MODE, NETLINK_FIREWALL_SOCKET__NLMSG_WRITE },
72 { IPQM_VERDICT, NETLINK_FIREWALL_SOCKET__NLMSG_WRITE },
73};
74
75static struct nlmsg_perm nlmsg_tcpdiag_perms[] =
76{
77 { TCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
James Morris216efaa2005-08-15 20:34:48 -070078 { DCCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
Linus Torvalds1da177e2005-04-16 15:20:36 -070079};
80
81static struct nlmsg_perm nlmsg_xfrm_perms[] =
82{
83 { XFRM_MSG_NEWSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
84 { XFRM_MSG_DELSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
85 { XFRM_MSG_GETSA, NETLINK_XFRM_SOCKET__NLMSG_READ },
86 { XFRM_MSG_NEWPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
87 { XFRM_MSG_DELPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
88 { XFRM_MSG_GETPOLICY, NETLINK_XFRM_SOCKET__NLMSG_READ },
89 { XFRM_MSG_ALLOCSPI, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
Jamal Hadi Salim8c29bfe2006-03-20 19:17:39 -080090 { XFRM_MSG_ACQUIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
91 { XFRM_MSG_EXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 { XFRM_MSG_UPDPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
93 { XFRM_MSG_UPDSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
Jamal Hadi Salim8c29bfe2006-03-20 19:17:39 -080094 { XFRM_MSG_POLEXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
95 { XFRM_MSG_FLUSHSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
96 { XFRM_MSG_FLUSHPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
97 { XFRM_MSG_NEWAE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
98 { XFRM_MSG_GETAE, NETLINK_XFRM_SOCKET__NLMSG_READ },
Linus Torvalds1da177e2005-04-16 15:20:36 -070099};
100
101static struct nlmsg_perm nlmsg_audit_perms[] =
102{
James Morrisb207a292005-05-01 08:58:40 -0700103 { AUDIT_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
104 { AUDIT_SET, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
105 { AUDIT_LIST, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
106 { AUDIT_ADD, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
107 { AUDIT_DEL, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
Amy Griffis93315ed2006-02-07 12:05:27 -0500108 { AUDIT_LIST_RULES, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
109 { AUDIT_ADD_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
110 { AUDIT_DEL_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
James Morrisb207a292005-05-01 08:58:40 -0700111 { AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
Steve Grubbc2f0c7c2005-05-06 12:38:39 +0100112 { AUDIT_SIGNAL_INFO, NETLINK_AUDIT_SOCKET__NLMSG_READ },
Miloslav Trmac522ed772007-07-15 23:40:56 -0700113 { AUDIT_TTY_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
114 { AUDIT_TTY_SET, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115};
116
117
118static int nlmsg_perm(u16 nlmsg_type, u32 *perm, struct nlmsg_perm *tab, size_t tabsize)
119{
120 int i, err = -EINVAL;
121
122 for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++)
123 if (nlmsg_type == tab[i].nlmsg_type) {
124 *perm = tab[i].perm;
125 err = 0;
126 break;
127 }
128
129 return err;
130}
131
132int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm)
133{
134 int err = 0;
135
136 switch (sclass) {
137 case SECCLASS_NETLINK_ROUTE_SOCKET:
138 err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms,
139 sizeof(nlmsg_route_perms));
140 break;
141
142 case SECCLASS_NETLINK_FIREWALL_SOCKET:
James Morris388c6972005-04-16 15:24:03 -0700143 case SECCLASS_NETLINK_IP6FW_SOCKET:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 err = nlmsg_perm(nlmsg_type, perm, nlmsg_firewall_perms,
145 sizeof(nlmsg_firewall_perms));
146 break;
147
148 case SECCLASS_NETLINK_TCPDIAG_SOCKET:
149 err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms,
150 sizeof(nlmsg_tcpdiag_perms));
151 break;
152
153 case SECCLASS_NETLINK_XFRM_SOCKET:
154 err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms,
155 sizeof(nlmsg_xfrm_perms));
156 break;
157
158 case SECCLASS_NETLINK_AUDIT_SOCKET:
Steve Grubb90d526c2005-11-03 15:48:08 +0000159 if ((nlmsg_type >= AUDIT_FIRST_USER_MSG &&
160 nlmsg_type <= AUDIT_LAST_USER_MSG) ||
161 (nlmsg_type >= AUDIT_FIRST_USER_MSG2 &&
162 nlmsg_type <= AUDIT_LAST_USER_MSG2)) {
David Woodhouse209aba02005-05-18 10:21:07 +0100163 *perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY;
164 } else {
165 err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms,
166 sizeof(nlmsg_audit_perms));
167 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 break;
169
170 /* No messaging from userspace, or class unknown/unhandled */
171 default:
172 err = -ENOENT;
173 break;
174 }
175
176 return err;
177}