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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> | |
216efaaa | 19 | #include <linux/inet_diag.h> |
1da177e4 LT |
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 }, | |
216efaaa | 79 | { DCCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ }, |
1da177e4 LT |
80 | }; |
81 | ||
82 | static 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 | ||
95 | static struct nlmsg_perm nlmsg_audit_perms[] = | |
96 | { | |
b207a290 JM |
97 | { 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 }, | |
93315ed6 AG |
102 | { 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 }, | |
b207a290 | 105 | { AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY }, |
c2f0c7c3 | 106 | { AUDIT_SIGNAL_INFO, NETLINK_AUDIT_SOCKET__NLMSG_READ }, |
1da177e4 LT |
107 | }; |
108 | ||
109 | ||
110 | static 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 | ||
124 | int 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: | |
388c6978 | 135 | case SECCLASS_NETLINK_IP6FW_SOCKET: |
1da177e4 LT |
136 | 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: | |
90d526c0 SG |
151 | 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)) { | |
209aba03 DW |
155 | *perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY; |
156 | } else { | |
157 | err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms, | |
158 | sizeof(nlmsg_audit_perms)); | |
159 | } | |
1da177e4 LT |
160 | break; |
161 | ||
162 | /* No messaging from userspace, or class unknown/unhandled */ | |
163 | default: | |
164 | err = -ENOENT; | |
165 | break; | |
166 | } | |
167 | ||
168 | return err; | |
169 | } |