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1da177e4 LT |
1 | /* |
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 | ||
26 | struct nlmsg_perm | |
27 | { | |
28 | u16 nlmsg_type; | |
29 | u32 perm; | |
30 | }; | |
31 | ||
32 | static 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 }, | |
c7fb64db TG |
66 | { RTM_GETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
67 | { RTM_SETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
1da177e4 LT |
68 | }; |
69 | ||
70 | static 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 | ||
76 | static struct nlmsg_perm nlmsg_tcpdiag_perms[] = | |
77 | { | |
78 | { TCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ }, | |
79 | }; | |
80 | ||
81 | static 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 }, | |
90 | { XFRM_MSG_UPDPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, | |
91 | { XFRM_MSG_UPDSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, | |
92 | }; | |
93 | ||
94 | static struct nlmsg_perm nlmsg_audit_perms[] = | |
95 | { | |
b207a290 JM |
96 | { AUDIT_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ }, |
97 | { AUDIT_SET, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, | |
98 | { AUDIT_LIST, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV }, | |
99 | { AUDIT_ADD, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, | |
100 | { AUDIT_DEL, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, | |
101 | { AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY }, | |
c2f0c7c3 | 102 | { AUDIT_SIGNAL_INFO, NETLINK_AUDIT_SOCKET__NLMSG_READ }, |
1da177e4 LT |
103 | }; |
104 | ||
105 | ||
106 | static int nlmsg_perm(u16 nlmsg_type, u32 *perm, struct nlmsg_perm *tab, size_t tabsize) | |
107 | { | |
108 | int i, err = -EINVAL; | |
109 | ||
110 | for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++) | |
111 | if (nlmsg_type == tab[i].nlmsg_type) { | |
112 | *perm = tab[i].perm; | |
113 | err = 0; | |
114 | break; | |
115 | } | |
116 | ||
117 | return err; | |
118 | } | |
119 | ||
120 | int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm) | |
121 | { | |
122 | int err = 0; | |
123 | ||
124 | switch (sclass) { | |
125 | case SECCLASS_NETLINK_ROUTE_SOCKET: | |
126 | err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms, | |
127 | sizeof(nlmsg_route_perms)); | |
128 | break; | |
129 | ||
130 | case SECCLASS_NETLINK_FIREWALL_SOCKET: | |
388c6978 | 131 | case SECCLASS_NETLINK_IP6FW_SOCKET: |
1da177e4 LT |
132 | err = nlmsg_perm(nlmsg_type, perm, nlmsg_firewall_perms, |
133 | sizeof(nlmsg_firewall_perms)); | |
134 | break; | |
135 | ||
136 | case SECCLASS_NETLINK_TCPDIAG_SOCKET: | |
137 | err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms, | |
138 | sizeof(nlmsg_tcpdiag_perms)); | |
139 | break; | |
140 | ||
141 | case SECCLASS_NETLINK_XFRM_SOCKET: | |
142 | err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms, | |
143 | sizeof(nlmsg_xfrm_perms)); | |
144 | break; | |
145 | ||
146 | case SECCLASS_NETLINK_AUDIT_SOCKET: | |
209aba03 DW |
147 | if (nlmsg_type >= AUDIT_FIRST_USER_MSG && |
148 | nlmsg_type <= AUDIT_LAST_USER_MSG) { | |
149 | *perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY; | |
150 | } else { | |
151 | err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms, | |
152 | sizeof(nlmsg_audit_perms)); | |
153 | } | |
1da177e4 LT |
154 | break; |
155 | ||
156 | /* No messaging from userspace, or class unknown/unhandled */ | |
157 | default: | |
158 | err = -ENOENT; | |
159 | break; | |
160 | } | |
161 | ||
162 | return err; | |
163 | } |