1 | /** |
---|
2 | * @file |
---|
3 | * |
---|
4 | * @ingroup rtems_bsd_rtems |
---|
5 | * |
---|
6 | * @brief This object is an minimal rtems implementation of kern_jail.c. |
---|
7 | */ |
---|
8 | |
---|
9 | /* |
---|
10 | * Copyright (c) 2009, 2010 embedded brains GmbH. All rights reserved. |
---|
11 | * |
---|
12 | * embedded brains GmbH |
---|
13 | * Obere Lagerstr. 30 |
---|
14 | * 82178 Puchheim |
---|
15 | * Germany |
---|
16 | * <rtems@embedded-brains.de> |
---|
17 | * |
---|
18 | * The license and distribution terms for this file may be |
---|
19 | * found in the file LICENSE in this distribution or at |
---|
20 | * http://www.rtems.com/license/LICENSE. |
---|
21 | */ |
---|
22 | |
---|
23 | #include <freebsd/machine/rtems-bsd-config.h> |
---|
24 | |
---|
25 | /*#include <freebsd/sys/types.h> |
---|
26 | #include <freebsd/sys/systm.h> |
---|
27 | #include <freebsd/sys/malloc.h> |
---|
28 | #include <freebsd/sys/jail.h> |
---|
29 | #include <freebsd/sys/lock.h> |
---|
30 | #include <freebsd/sys/mutex.h>*/ |
---|
31 | |
---|
32 | #include <freebsd/sys/param.h> |
---|
33 | #include <freebsd/sys/types.h> |
---|
34 | #include <freebsd/sys/kernel.h> |
---|
35 | #include <freebsd/sys/systm.h> |
---|
36 | #include <freebsd/sys/errno.h> |
---|
37 | #include <freebsd/sys/sysproto.h> |
---|
38 | #include <freebsd/sys/malloc.h> |
---|
39 | #include <freebsd/sys/osd.h> |
---|
40 | #include <freebsd/sys/priv.h> |
---|
41 | #include <freebsd/sys/proc.h> |
---|
42 | #include <freebsd/sys/taskqueue.h> |
---|
43 | #include <freebsd/sys/fcntl.h> |
---|
44 | #include <freebsd/sys/jail.h> |
---|
45 | #include <freebsd/sys/lock.h> |
---|
46 | #include <freebsd/sys/mutex.h> |
---|
47 | #include <freebsd/sys/sx.h> |
---|
48 | #include <freebsd/sys/sysent.h> |
---|
49 | #include <freebsd/sys/namei.h> |
---|
50 | #include <freebsd/sys/mount.h> |
---|
51 | #include <freebsd/sys/queue.h> |
---|
52 | #include <freebsd/sys/socket.h> |
---|
53 | #include <freebsd/sys/syscallsubr.h> |
---|
54 | #include <freebsd/sys/sysctl.h> |
---|
55 | |
---|
56 | #define DEFAULT_HOSTUUID "00000000-0000-0000-0000-000000000000" |
---|
57 | |
---|
58 | /* Keep struct prison prison0 and some code in kern_jail_set() readable. */ |
---|
59 | #ifdef INET |
---|
60 | #ifdef INET6 |
---|
61 | #define _PR_IP_SADDRSEL PR_IP4_SADDRSEL|PR_IP6_SADDRSEL |
---|
62 | #else |
---|
63 | #define _PR_IP_SADDRSEL PR_IP4_SADDRSEL |
---|
64 | #endif |
---|
65 | #else /* !INET */ |
---|
66 | #ifdef INET6 |
---|
67 | #define _PR_IP_SADDRSEL PR_IP6_SADDRSEL |
---|
68 | #else |
---|
69 | #define _PR_IP_SADDRSEL 0 |
---|
70 | #endif |
---|
71 | #endif |
---|
72 | |
---|
73 | /* prison0 describes what is "real" about the system. */ |
---|
74 | struct prison prison0 = { |
---|
75 | .pr_id = 0, |
---|
76 | .pr_name = "0", |
---|
77 | .pr_ref = 1, |
---|
78 | .pr_uref = 1, |
---|
79 | .pr_path = "/", |
---|
80 | .pr_securelevel = -1, |
---|
81 | .pr_childmax = JAIL_MAX, |
---|
82 | .pr_hostuuid = DEFAULT_HOSTUUID, |
---|
83 | .pr_children = LIST_HEAD_INITIALIZER(prison0.pr_children), |
---|
84 | #ifdef VIMAGE |
---|
85 | .pr_flags = PR_HOST|PR_VNET|_PR_IP_SADDRSEL, |
---|
86 | #else |
---|
87 | .pr_flags = PR_HOST|_PR_IP_SADDRSEL, |
---|
88 | #endif |
---|
89 | .pr_allow = PR_ALLOW_ALL, |
---|
90 | }; |
---|
91 | MTX_SYSINIT(prison0, &prison0.pr_mtx, "jail mutex", MTX_DEF); |
---|
92 | |
---|
93 | /* |
---|
94 | * See if a prison has the specific flag set. |
---|
95 | */ |
---|
96 | int |
---|
97 | prison_flag(struct ucred *cred, unsigned flag) |
---|
98 | { |
---|
99 | /* This is an atomic read, so no locking is necessary. */ |
---|
100 | return (cred->cr_prison->pr_flags & flag); |
---|
101 | } |
---|
102 | |
---|
103 | void |
---|
104 | prison_free(struct prison *pr) |
---|
105 | { |
---|
106 | } |
---|
107 | |
---|
108 | void |
---|
109 | prison_hold(struct prison *pr) |
---|
110 | { |
---|
111 | } |
---|
112 | |
---|
113 | /* |
---|
114 | * Check if given address belongs to the jail referenced by cred (wrapper to |
---|
115 | * prison_check_ip[46]). |
---|
116 | * |
---|
117 | * Returns 0 if jail doesn't restrict the address family or if address belongs |
---|
118 | * to jail, EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if |
---|
119 | * the jail doesn't allow the address family. IPv4 Address passed in in NBO. |
---|
120 | */ |
---|
121 | int |
---|
122 | prison_if(struct ucred *cred, struct sockaddr *sa) |
---|
123 | { |
---|
124 | return 0; |
---|
125 | } |
---|
126 | |
---|
127 | /* |
---|
128 | * Return 1 if we should do proper source address selection or are not jailed. |
---|
129 | * We will return 0 if we should bypass source address selection in favour |
---|
130 | * of the primary jail IPv6 address. Only in this case *ia will be updated and |
---|
131 | * returned in NBO. |
---|
132 | * Return EAFNOSUPPORT, in case this jail does not allow IPv6. |
---|
133 | */ |
---|
134 | int |
---|
135 | prison_saddrsel_ip6(struct ucred *cred, struct in6_addr *ia6) |
---|
136 | { |
---|
137 | return EAFNOSUPPORT; |
---|
138 | } |
---|
139 | |
---|
140 | /* |
---|
141 | * Return true if pr1 and pr2 have the same IPv4 address restrictions. |
---|
142 | */ |
---|
143 | int |
---|
144 | prison_equal_ip4(struct prison *pr1, struct prison *pr2) |
---|
145 | { |
---|
146 | return 1; |
---|
147 | } |
---|
148 | |
---|
149 | /* |
---|
150 | * Check if given address belongs to the jail referenced by cred/prison. |
---|
151 | * |
---|
152 | * Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail, |
---|
153 | * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail |
---|
154 | * doesn't allow IPv4. Address passed in in NBO. |
---|
155 | */ |
---|
156 | int |
---|
157 | prison_check_ip4(struct ucred *cred, struct in_addr *ia) |
---|
158 | { |
---|
159 | return 0; |
---|
160 | } |
---|
161 | |
---|
162 | /* |
---|
163 | * Assuming 0 means no restrictions. |
---|
164 | * |
---|
165 | * NOTE: RTEMS does not restrict via a jail so return 0. |
---|
166 | */ |
---|
167 | int |
---|
168 | prison_check_ip6(struct ucred *cred, struct in6_addr *ia6) |
---|
169 | { |
---|
170 | return 0; |
---|
171 | } |
---|
172 | |
---|
173 | /* |
---|
174 | * Make sure our (source) address is set to something meaningful to this |
---|
175 | * jail. |
---|
176 | * |
---|
177 | * Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail, |
---|
178 | * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail |
---|
179 | * doesn't allow IPv4. Address passed in in NBO and returned in NBO. |
---|
180 | */ |
---|
181 | int |
---|
182 | prison_local_ip4(struct ucred *cred, struct in_addr *ia) |
---|
183 | { |
---|
184 | return EAFNOSUPPORT; |
---|
185 | } |
---|
186 | |
---|
187 | /* |
---|
188 | * Rewrite destination address in case we will connect to loopback address. |
---|
189 | * |
---|
190 | * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. |
---|
191 | * Address passed in in NBO and returned in NBO. |
---|
192 | */ |
---|
193 | int |
---|
194 | prison_remote_ip4(struct ucred *cred, struct in_addr *ia) |
---|
195 | { |
---|
196 | return EAFNOSUPPORT; |
---|
197 | } |
---|
198 | |
---|
199 | /* |
---|
200 | * Return true if pr1 and pr2 have the same IPv6 address restrictions. |
---|
201 | */ |
---|
202 | int |
---|
203 | prison_equal_ip6(struct prison *pr1, struct prison *pr2) |
---|
204 | { |
---|
205 | return 1; |
---|
206 | } |
---|
207 | |
---|
208 | /* |
---|
209 | * Make sure our (source) address is set to something meaningful to this jail. |
---|
210 | * |
---|
211 | * v6only should be set based on (inp->inp_flags & IN6P_IPV6_V6ONLY != 0) |
---|
212 | * when needed while binding. |
---|
213 | * |
---|
214 | * Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail, |
---|
215 | * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail |
---|
216 | * doesn't allow IPv6. |
---|
217 | * |
---|
218 | * NOTE: RTEMS does not restrict via a jail so return 0. |
---|
219 | */ |
---|
220 | int |
---|
221 | prison_local_ip6(struct ucred *cred, struct in6_addr *ia6, int v6only) |
---|
222 | { |
---|
223 | return 0; |
---|
224 | } |
---|
225 | |
---|
226 | /* |
---|
227 | * Rewrite destination address in case we will connect to loopback address. |
---|
228 | * |
---|
229 | * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. |
---|
230 | * |
---|
231 | * NOTE: RTEMS does not restrict via a jail so return 0. |
---|
232 | */ |
---|
233 | int |
---|
234 | prison_remote_ip6(struct ucred *cred, struct in6_addr *ia6) |
---|
235 | { |
---|
236 | return 0; |
---|
237 | } |
---|