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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/inet_diag.h>
18#include <linux/xfrm.h>
19#include <linux/audit.h>
20#include <linux/sock_diag.h>
21
22#include "flask.h"
23#include "av_permissions.h"
24#include "security.h"
25
26struct nlmsg_perm {
27 u16 nlmsg_type;
28 u32 perm;
29};
30
31static struct nlmsg_perm nlmsg_route_perms[] =
32{
33 { RTM_NEWLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
34 { RTM_DELLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
35 { RTM_GETLINK, NETLINK_ROUTE_SOCKET__NLMSG_READ },
36 { RTM_SETLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
37 { RTM_NEWADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
38 { RTM_DELADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
39 { RTM_GETADDR, NETLINK_ROUTE_SOCKET__NLMSG_READ },
40 { RTM_NEWROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
41 { RTM_DELROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
42 { RTM_GETROUTE, NETLINK_ROUTE_SOCKET__NLMSG_READ },
43 { RTM_NEWNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
44 { RTM_DELNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
45 { RTM_GETNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_READ },
46 { RTM_NEWRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
47 { RTM_DELRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
48 { RTM_GETRULE, NETLINK_ROUTE_SOCKET__NLMSG_READ },
49 { RTM_NEWQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
50 { RTM_DELQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
51 { RTM_GETQDISC, NETLINK_ROUTE_SOCKET__NLMSG_READ },
52 { RTM_NEWTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
53 { RTM_DELTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
54 { RTM_GETTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_READ },
55 { RTM_NEWTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
56 { RTM_DELTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
57 { RTM_GETTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_READ },
58 { RTM_NEWACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
59 { RTM_DELACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
60 { RTM_GETACTION, NETLINK_ROUTE_SOCKET__NLMSG_READ },
61 { RTM_NEWPREFIX, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
62 { RTM_GETMULTICAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
63 { RTM_GETANYCAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
64 { RTM_GETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
65 { RTM_SETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
66 { RTM_NEWADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
67 { RTM_DELADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
68 { RTM_GETADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
69 { RTM_GETDCB, NETLINK_ROUTE_SOCKET__NLMSG_READ },
70 { RTM_SETDCB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
71 { RTM_NEWNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
72 { RTM_GETNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_READ },
73 { RTM_NEWMDB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
74 { RTM_DELMDB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
75 { RTM_GETMDB, NETLINK_ROUTE_SOCKET__NLMSG_READ },
76 { RTM_NEWNSID, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
77 { RTM_DELNSID, NETLINK_ROUTE_SOCKET__NLMSG_READ },
78 { RTM_GETNSID, NETLINK_ROUTE_SOCKET__NLMSG_READ },
79 { RTM_NEWSTATS, NETLINK_ROUTE_SOCKET__NLMSG_READ },
80 { RTM_GETSTATS, NETLINK_ROUTE_SOCKET__NLMSG_READ },
81};
82
83static struct nlmsg_perm nlmsg_tcpdiag_perms[] =
84{
85 { TCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
86 { DCCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
87 { SOCK_DIAG_BY_FAMILY, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
88 { SOCK_DESTROY, NETLINK_TCPDIAG_SOCKET__NLMSG_WRITE },
89};
90
91static struct nlmsg_perm nlmsg_xfrm_perms[] =
92{
93 { XFRM_MSG_NEWSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
94 { XFRM_MSG_DELSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
95 { XFRM_MSG_GETSA, NETLINK_XFRM_SOCKET__NLMSG_READ },
96 { XFRM_MSG_NEWPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
97 { XFRM_MSG_DELPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
98 { XFRM_MSG_GETPOLICY, NETLINK_XFRM_SOCKET__NLMSG_READ },
99 { XFRM_MSG_ALLOCSPI, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
100 { XFRM_MSG_ACQUIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
101 { XFRM_MSG_EXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
102 { XFRM_MSG_UPDPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
103 { XFRM_MSG_UPDSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
104 { XFRM_MSG_POLEXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
105 { XFRM_MSG_FLUSHSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
106 { XFRM_MSG_FLUSHPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
107 { XFRM_MSG_NEWAE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
108 { XFRM_MSG_GETAE, NETLINK_XFRM_SOCKET__NLMSG_READ },
109 { XFRM_MSG_REPORT, NETLINK_XFRM_SOCKET__NLMSG_READ },
110 { XFRM_MSG_MIGRATE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
111 { XFRM_MSG_NEWSADINFO, NETLINK_XFRM_SOCKET__NLMSG_READ },
112 { XFRM_MSG_GETSADINFO, NETLINK_XFRM_SOCKET__NLMSG_READ },
113 { XFRM_MSG_NEWSPDINFO, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
114 { XFRM_MSG_GETSPDINFO, NETLINK_XFRM_SOCKET__NLMSG_READ },
115 { XFRM_MSG_MAPPING, NETLINK_XFRM_SOCKET__NLMSG_READ },
116};
117
118static struct nlmsg_perm nlmsg_audit_perms[] =
119{
120 { AUDIT_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
121 { AUDIT_SET, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
122 { AUDIT_LIST, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
123 { AUDIT_ADD, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
124 { AUDIT_DEL, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
125 { AUDIT_LIST_RULES, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
126 { AUDIT_ADD_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
127 { AUDIT_DEL_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
128 { AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
129 { AUDIT_SIGNAL_INFO, NETLINK_AUDIT_SOCKET__NLMSG_READ },
130 { AUDIT_TRIM, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
131 { AUDIT_MAKE_EQUIV, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
132 { AUDIT_TTY_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
133 { AUDIT_TTY_SET, NETLINK_AUDIT_SOCKET__NLMSG_TTY_AUDIT },
134 { AUDIT_GET_FEATURE, NETLINK_AUDIT_SOCKET__NLMSG_READ },
135 { AUDIT_SET_FEATURE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
136};
137
138
139static int nlmsg_perm(u16 nlmsg_type, u32 *perm, struct nlmsg_perm *tab, size_t tabsize)
140{
141 int i, err = -EINVAL;
142
143 for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++)
144 if (nlmsg_type == tab[i].nlmsg_type) {
145 *perm = tab[i].perm;
146 err = 0;
147 break;
148 }
149
150 return err;
151}
152
153int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm)
154{
155 int err = 0;
156
157 switch (sclass) {
158 case SECCLASS_NETLINK_ROUTE_SOCKET:
159
160 BUILD_BUG_ON(RTM_MAX != (RTM_NEWSTATS + 3));
161 err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms,
162 sizeof(nlmsg_route_perms));
163 break;
164
165 case SECCLASS_NETLINK_TCPDIAG_SOCKET:
166 err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms,
167 sizeof(nlmsg_tcpdiag_perms));
168 break;
169
170 case SECCLASS_NETLINK_XFRM_SOCKET:
171 BUILD_BUG_ON(XFRM_MSG_MAX != XFRM_MSG_MAPPING);
172 err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms,
173 sizeof(nlmsg_xfrm_perms));
174 break;
175
176 case SECCLASS_NETLINK_AUDIT_SOCKET:
177 if ((nlmsg_type >= AUDIT_FIRST_USER_MSG &&
178 nlmsg_type <= AUDIT_LAST_USER_MSG) ||
179 (nlmsg_type >= AUDIT_FIRST_USER_MSG2 &&
180 nlmsg_type <= AUDIT_LAST_USER_MSG2)) {
181 *perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY;
182 } else {
183 err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms,
184 sizeof(nlmsg_audit_perms));
185 }
186 break;
187
188
189 default:
190 err = -ENOENT;
191 break;
192 }
193
194 return err;
195}
196
