blob: 73158244cf8c8f86498e22ff3905b6a6d562c8ea [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 },
63 { RTM_GETPREFIX, NETLINK_ROUTE_SOCKET__NLMSG_READ },
64 { RTM_GETMULTICAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
65 { RTM_GETANYCAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
Thomas Grafc7fb64d2005-06-18 22:50:55 -070066 { RTM_GETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
67 { RTM_SETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
Linus Torvalds1da177e2005-04-16 15:20:36 -070068};
69
70static struct nlmsg_perm nlmsg_firewall_perms[] =
71{
72 { IPQM_MODE, NETLINK_FIREWALL_SOCKET__NLMSG_WRITE },
73 { IPQM_VERDICT, NETLINK_FIREWALL_SOCKET__NLMSG_WRITE },
74};
75
76static struct nlmsg_perm nlmsg_tcpdiag_perms[] =
77{
78 { TCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
James Morris216efaa2005-08-15 20:34:48 -070079 { DCCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
Linus Torvalds1da177e2005-04-16 15:20:36 -070080};
81
82static struct nlmsg_perm nlmsg_xfrm_perms[] =
83{
84 { XFRM_MSG_NEWSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
85 { XFRM_MSG_DELSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
86 { XFRM_MSG_GETSA, NETLINK_XFRM_SOCKET__NLMSG_READ },
87 { XFRM_MSG_NEWPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
88 { XFRM_MSG_DELPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
89 { XFRM_MSG_GETPOLICY, NETLINK_XFRM_SOCKET__NLMSG_READ },
90 { XFRM_MSG_ALLOCSPI, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
91 { XFRM_MSG_UPDPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
92 { XFRM_MSG_UPDSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
93};
94
95static struct nlmsg_perm nlmsg_audit_perms[] =
96{
James Morrisb207a292005-05-01 08:58:40 -070097 { AUDIT_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
98 { AUDIT_SET, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
99 { AUDIT_LIST, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
100 { AUDIT_ADD, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
101 { AUDIT_DEL, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
Amy Griffis93315ed2006-02-07 12:05:27 -0500102 { AUDIT_LIST_RULES, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
103 { AUDIT_ADD_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
104 { AUDIT_DEL_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
James Morrisb207a292005-05-01 08:58:40 -0700105 { AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
Steve Grubbc2f0c7c2005-05-06 12:38:39 +0100106 { AUDIT_SIGNAL_INFO, NETLINK_AUDIT_SOCKET__NLMSG_READ },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107};
108
109
110static int nlmsg_perm(u16 nlmsg_type, u32 *perm, struct nlmsg_perm *tab, size_t tabsize)
111{
112 int i, err = -EINVAL;
113
114 for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++)
115 if (nlmsg_type == tab[i].nlmsg_type) {
116 *perm = tab[i].perm;
117 err = 0;
118 break;
119 }
120
121 return err;
122}
123
124int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm)
125{
126 int err = 0;
127
128 switch (sclass) {
129 case SECCLASS_NETLINK_ROUTE_SOCKET:
130 err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms,
131 sizeof(nlmsg_route_perms));
132 break;
133
134 case SECCLASS_NETLINK_FIREWALL_SOCKET:
James Morris388c6972005-04-16 15:24:03 -0700135 case SECCLASS_NETLINK_IP6FW_SOCKET:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 err = nlmsg_perm(nlmsg_type, perm, nlmsg_firewall_perms,
137 sizeof(nlmsg_firewall_perms));
138 break;
139
140 case SECCLASS_NETLINK_TCPDIAG_SOCKET:
141 err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms,
142 sizeof(nlmsg_tcpdiag_perms));
143 break;
144
145 case SECCLASS_NETLINK_XFRM_SOCKET:
146 err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms,
147 sizeof(nlmsg_xfrm_perms));
148 break;
149
150 case SECCLASS_NETLINK_AUDIT_SOCKET:
Steve Grubb90d526c2005-11-03 15:48:08 +0000151 if ((nlmsg_type >= AUDIT_FIRST_USER_MSG &&
152 nlmsg_type <= AUDIT_LAST_USER_MSG) ||
153 (nlmsg_type >= AUDIT_FIRST_USER_MSG2 &&
154 nlmsg_type <= AUDIT_LAST_USER_MSG2)) {
David Woodhouse209aba02005-05-18 10:21:07 +0100155 *perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY;
156 } else {
157 err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms,
158 sizeof(nlmsg_audit_perms));
159 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 break;
161
162 /* No messaging from userspace, or class unknown/unhandled */
163 default:
164 err = -ENOENT;
165 break;
166 }
167
168 return err;
169}