blob: deac14367d438c2d7eddb7b056a2a6d06b4c3090 [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>
19#include <linux/tcp_diag.h>
20#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 },
66};
67
68static struct nlmsg_perm nlmsg_firewall_perms[] =
69{
70 { IPQM_MODE, NETLINK_FIREWALL_SOCKET__NLMSG_WRITE },
71 { IPQM_VERDICT, NETLINK_FIREWALL_SOCKET__NLMSG_WRITE },
72};
73
74static struct nlmsg_perm nlmsg_tcpdiag_perms[] =
75{
76 { TCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
77};
78
79static struct nlmsg_perm nlmsg_xfrm_perms[] =
80{
81 { XFRM_MSG_NEWSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
82 { XFRM_MSG_DELSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
83 { XFRM_MSG_GETSA, NETLINK_XFRM_SOCKET__NLMSG_READ },
84 { XFRM_MSG_NEWPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
85 { XFRM_MSG_DELPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
86 { XFRM_MSG_GETPOLICY, NETLINK_XFRM_SOCKET__NLMSG_READ },
87 { XFRM_MSG_ALLOCSPI, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
88 { XFRM_MSG_UPDPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
89 { XFRM_MSG_UPDSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
90};
91
92static struct nlmsg_perm nlmsg_audit_perms[] =
93{
James Morrisb207a292005-05-01 08:58:40 -070094 { AUDIT_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
95 { AUDIT_SET, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
96 { AUDIT_LIST, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
97 { AUDIT_ADD, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
98 { AUDIT_DEL, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
99 { AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
Steve Grubbc2f0c7c2005-05-06 12:38:39 +0100100 { AUDIT_SIGNAL_INFO, NETLINK_AUDIT_SOCKET__NLMSG_READ },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101};
102
103
104static int nlmsg_perm(u16 nlmsg_type, u32 *perm, struct nlmsg_perm *tab, size_t tabsize)
105{
106 int i, err = -EINVAL;
107
108 for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++)
109 if (nlmsg_type == tab[i].nlmsg_type) {
110 *perm = tab[i].perm;
111 err = 0;
112 break;
113 }
114
115 return err;
116}
117
118int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm)
119{
120 int err = 0;
121
122 switch (sclass) {
123 case SECCLASS_NETLINK_ROUTE_SOCKET:
124 err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms,
125 sizeof(nlmsg_route_perms));
126 break;
127
128 case SECCLASS_NETLINK_FIREWALL_SOCKET:
James Morris388c6972005-04-16 15:24:03 -0700129 case SECCLASS_NETLINK_IP6FW_SOCKET:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 err = nlmsg_perm(nlmsg_type, perm, nlmsg_firewall_perms,
131 sizeof(nlmsg_firewall_perms));
132 break;
133
134 case SECCLASS_NETLINK_TCPDIAG_SOCKET:
135 err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms,
136 sizeof(nlmsg_tcpdiag_perms));
137 break;
138
139 case SECCLASS_NETLINK_XFRM_SOCKET:
140 err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms,
141 sizeof(nlmsg_xfrm_perms));
142 break;
143
144 case SECCLASS_NETLINK_AUDIT_SOCKET:
145 err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms,
146 sizeof(nlmsg_audit_perms));
147 break;
148
149 /* No messaging from userspace, or class unknown/unhandled */
150 default:
151 err = -ENOENT;
152 break;
153 }
154
155 return err;
156}