Fix common misspellings
[linux-2.6.git] / security / selinux / nlmsgtab.c
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/netlink.h>
15 #include <linux/rtnetlink.h>
16 #include <linux/if.h>
17 #include <linux/netfilter_ipv4/ip_queue.h>
18 #include <linux/inet_diag.h>
19 #include <linux/xfrm.h>
20 #include <linux/audit.h>
21
22 #include "flask.h"
23 #include "av_permissions.h"
24
25 struct nlmsg_perm {
26         u16     nlmsg_type;
27         u32     perm;
28 };
29
30 static struct nlmsg_perm nlmsg_route_perms[] =
31 {
32         { RTM_NEWLINK,          NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
33         { RTM_DELLINK,          NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
34         { RTM_GETLINK,          NETLINK_ROUTE_SOCKET__NLMSG_READ  },
35         { RTM_SETLINK,          NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
36         { RTM_NEWADDR,          NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
37         { RTM_DELADDR,          NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
38         { RTM_GETADDR,          NETLINK_ROUTE_SOCKET__NLMSG_READ  },
39         { RTM_NEWROUTE,         NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
40         { RTM_DELROUTE,         NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
41         { RTM_GETROUTE,         NETLINK_ROUTE_SOCKET__NLMSG_READ  },
42         { RTM_NEWNEIGH,         NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
43         { RTM_DELNEIGH,         NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
44         { RTM_GETNEIGH,         NETLINK_ROUTE_SOCKET__NLMSG_READ  },
45         { RTM_NEWRULE,          NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
46         { RTM_DELRULE,          NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
47         { RTM_GETRULE,          NETLINK_ROUTE_SOCKET__NLMSG_READ  },
48         { RTM_NEWQDISC,         NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
49         { RTM_DELQDISC,         NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
50         { RTM_GETQDISC,         NETLINK_ROUTE_SOCKET__NLMSG_READ  },
51         { RTM_NEWTCLASS,        NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
52         { RTM_DELTCLASS,        NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
53         { RTM_GETTCLASS,        NETLINK_ROUTE_SOCKET__NLMSG_READ  },
54         { RTM_NEWTFILTER,       NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
55         { RTM_DELTFILTER,       NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
56         { RTM_GETTFILTER,       NETLINK_ROUTE_SOCKET__NLMSG_READ  },
57         { RTM_NEWACTION,        NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
58         { RTM_DELACTION,        NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
59         { RTM_GETACTION,        NETLINK_ROUTE_SOCKET__NLMSG_READ  },
60         { RTM_NEWPREFIX,        NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
61         { RTM_GETMULTICAST,     NETLINK_ROUTE_SOCKET__NLMSG_READ  },
62         { RTM_GETANYCAST,       NETLINK_ROUTE_SOCKET__NLMSG_READ  },
63         { RTM_GETNEIGHTBL,      NETLINK_ROUTE_SOCKET__NLMSG_READ  },
64         { RTM_SETNEIGHTBL,      NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
65         { RTM_NEWADDRLABEL,     NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
66         { RTM_DELADDRLABEL,     NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
67         { RTM_GETADDRLABEL,     NETLINK_ROUTE_SOCKET__NLMSG_READ  },
68         { RTM_GETDCB,           NETLINK_ROUTE_SOCKET__NLMSG_READ  },
69         { RTM_SETDCB,           NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
70 };
71
72 static struct nlmsg_perm nlmsg_firewall_perms[] =
73 {
74         { IPQM_MODE,            NETLINK_FIREWALL_SOCKET__NLMSG_WRITE },
75         { IPQM_VERDICT,         NETLINK_FIREWALL_SOCKET__NLMSG_WRITE },
76 };
77
78 static struct nlmsg_perm nlmsg_tcpdiag_perms[] =
79 {
80         { TCPDIAG_GETSOCK,      NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
81         { DCCPDIAG_GETSOCK,     NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
82 };
83
84 static struct nlmsg_perm nlmsg_xfrm_perms[] =
85 {
86         { XFRM_MSG_NEWSA,       NETLINK_XFRM_SOCKET__NLMSG_WRITE },
87         { XFRM_MSG_DELSA,       NETLINK_XFRM_SOCKET__NLMSG_WRITE },
88         { XFRM_MSG_GETSA,       NETLINK_XFRM_SOCKET__NLMSG_READ  },
89         { XFRM_MSG_NEWPOLICY,   NETLINK_XFRM_SOCKET__NLMSG_WRITE },
90         { XFRM_MSG_DELPOLICY,   NETLINK_XFRM_SOCKET__NLMSG_WRITE },
91         { XFRM_MSG_GETPOLICY,   NETLINK_XFRM_SOCKET__NLMSG_READ  },
92         { XFRM_MSG_ALLOCSPI,    NETLINK_XFRM_SOCKET__NLMSG_WRITE },
93         { XFRM_MSG_ACQUIRE,     NETLINK_XFRM_SOCKET__NLMSG_WRITE },
94         { XFRM_MSG_EXPIRE,      NETLINK_XFRM_SOCKET__NLMSG_WRITE },
95         { XFRM_MSG_UPDPOLICY,   NETLINK_XFRM_SOCKET__NLMSG_WRITE },
96         { XFRM_MSG_UPDSA,       NETLINK_XFRM_SOCKET__NLMSG_WRITE },
97         { XFRM_MSG_POLEXPIRE,   NETLINK_XFRM_SOCKET__NLMSG_WRITE },
98         { XFRM_MSG_FLUSHSA,     NETLINK_XFRM_SOCKET__NLMSG_WRITE },
99         { XFRM_MSG_FLUSHPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
100         { XFRM_MSG_NEWAE,       NETLINK_XFRM_SOCKET__NLMSG_WRITE },
101         { XFRM_MSG_GETAE,       NETLINK_XFRM_SOCKET__NLMSG_READ  },
102 };
103
104 static struct nlmsg_perm nlmsg_audit_perms[] =
105 {
106         { AUDIT_GET,            NETLINK_AUDIT_SOCKET__NLMSG_READ     },
107         { AUDIT_SET,            NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
108         { AUDIT_LIST,           NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
109         { AUDIT_ADD,            NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
110         { AUDIT_DEL,            NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
111         { AUDIT_LIST_RULES,     NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
112         { AUDIT_ADD_RULE,       NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
113         { AUDIT_DEL_RULE,       NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
114         { AUDIT_USER,           NETLINK_AUDIT_SOCKET__NLMSG_RELAY    },
115         { AUDIT_SIGNAL_INFO,    NETLINK_AUDIT_SOCKET__NLMSG_READ     },
116         { AUDIT_TRIM,           NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
117         { AUDIT_MAKE_EQUIV,     NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
118         { AUDIT_TTY_GET,        NETLINK_AUDIT_SOCKET__NLMSG_READ     },
119         { AUDIT_TTY_SET,        NETLINK_AUDIT_SOCKET__NLMSG_TTY_AUDIT   },
120 };
121
122
123 static int nlmsg_perm(u16 nlmsg_type, u32 *perm, struct nlmsg_perm *tab, size_t tabsize)
124 {
125         int i, err = -EINVAL;
126
127         for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++)
128                 if (nlmsg_type == tab[i].nlmsg_type) {
129                         *perm = tab[i].perm;
130                         err = 0;
131                         break;
132                 }
133
134         return err;
135 }
136
137 int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm)
138 {
139         int err = 0;
140
141         switch (sclass) {
142         case SECCLASS_NETLINK_ROUTE_SOCKET:
143                 err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms,
144                                  sizeof(nlmsg_route_perms));
145                 break;
146
147         case SECCLASS_NETLINK_FIREWALL_SOCKET:
148         case SECCLASS_NETLINK_IP6FW_SOCKET:
149                 err = nlmsg_perm(nlmsg_type, perm, nlmsg_firewall_perms,
150                                  sizeof(nlmsg_firewall_perms));
151                 break;
152
153         case SECCLASS_NETLINK_TCPDIAG_SOCKET:
154                 err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms,
155                                  sizeof(nlmsg_tcpdiag_perms));
156                 break;
157
158         case SECCLASS_NETLINK_XFRM_SOCKET:
159                 err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms,
160                                  sizeof(nlmsg_xfrm_perms));
161                 break;
162
163         case SECCLASS_NETLINK_AUDIT_SOCKET:
164                 if ((nlmsg_type >= AUDIT_FIRST_USER_MSG &&
165                      nlmsg_type <= AUDIT_LAST_USER_MSG) ||
166                     (nlmsg_type >= AUDIT_FIRST_USER_MSG2 &&
167                      nlmsg_type <= AUDIT_LAST_USER_MSG2)) {
168                         *perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY;
169                 } else {
170                         err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms,
171                                          sizeof(nlmsg_audit_perms));
172                 }
173                 break;
174
175         /* No messaging from userspace, or class unknown/unhandled */
176         default:
177                 err = -ENOENT;
178                 break;
179         }
180
181         return err;
182 }