1/*-
2 * Copyright (c) 2011 James Gritton
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 2011 James Gritton
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
|
28__FBSDID("$FreeBSD: head/usr.sbin/jail/config.c 234712 2012-04-26 17:36:05Z jamie $");
| 28__FBSDID("$FreeBSD: head/usr.sbin/jail/config.c 234988 2012-05-03 21:39:23Z jamie $");
|
29
30#include <sys/types.h>
31#include <sys/errno.h>
32#include <sys/socket.h>
33#include <sys/sysctl.h>
34
35#include <arpa/inet.h>
36#include <netinet/in.h>
37
38#include <err.h>
39#include <netdb.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <string.h>
43#include <unistd.h>
44
45#include "jailp.h"
46
47struct ipspec {
48 const char *name;
49 unsigned flags;
50};
51
52extern FILE *yyin;
53extern int yynerrs;
54
55struct cfjails cfjails = TAILQ_HEAD_INITIALIZER(cfjails);
56
57static void free_param(struct cfparams *pp, struct cfparam *p);
58static void free_param_strings(struct cfparam *p);
59
60static const struct ipspec intparams[] = {
61 [IP_ALLOW_DYING] = {"allow.dying", PF_INTERNAL | PF_BOOL},
62 [IP_COMMAND] = {"command", PF_INTERNAL},
63 [IP_DEPEND] = {"depend", PF_INTERNAL},
64 [IP_EXEC_CLEAN] = {"exec.clean", PF_INTERNAL | PF_BOOL},
65 [IP_EXEC_CONSOLELOG] = {"exec.consolelog", PF_INTERNAL},
66 [IP_EXEC_FIB] = {"exec.fib", PF_INTERNAL | PF_INT},
67 [IP_EXEC_JAIL_USER] = {"exec.jail_user", PF_INTERNAL},
68 [IP_EXEC_POSTSTART] = {"exec.poststart", PF_INTERNAL},
69 [IP_EXEC_POSTSTOP] = {"exec.poststop", PF_INTERNAL},
70 [IP_EXEC_PRESTART] = {"exec.prestart", PF_INTERNAL},
71 [IP_EXEC_PRESTOP] = {"exec.prestop", PF_INTERNAL},
72 [IP_EXEC_START] = {"exec.start", PF_INTERNAL},
73 [IP_EXEC_STOP] = {"exec.stop", PF_INTERNAL},
74 [IP_EXEC_SYSTEM_JAIL_USER]= {"exec.system_jail_user",
75 PF_INTERNAL | PF_BOOL},
76 [IP_EXEC_SYSTEM_USER] = {"exec.system_user", PF_INTERNAL},
77 [IP_EXEC_TIMEOUT] = {"exec.timeout", PF_INTERNAL | PF_INT},
78#if defined(INET) || defined(INET6)
79 [IP_INTERFACE] = {"interface", PF_INTERNAL},
80 [IP_IP_HOSTNAME] = {"ip_hostname", PF_INTERNAL | PF_BOOL},
81#endif
82 [IP_MOUNT] = {"mount", PF_INTERNAL},
83 [IP_MOUNT_DEVFS] = {"mount.devfs", PF_INTERNAL | PF_BOOL},
84 [IP_MOUNT_FSTAB] = {"mount.fstab", PF_INTERNAL},
85 [IP_STOP_TIMEOUT] = {"stop.timeout", PF_INTERNAL | PF_INT},
86 [IP_VNET_INTERFACE] = {"vnet.interface", PF_INTERNAL},
87#ifdef INET
88 [IP__IP4_IFADDR] = {"ip4.addr", PF_INTERNAL | PF_CONV},
89#endif
90#ifdef INET6
91 [IP__IP6_IFADDR] = {"ip6.addr", PF_INTERNAL | PF_CONV},
92#endif
93 [IP__MOUNT_FROM_FSTAB] = {"mount.fstab", PF_INTERNAL | PF_CONV},
94 [IP__OP] = {NULL, PF_CONV},
95 [KP_ALLOW_CHFLAGS] = {"allow.chflags", 0},
96 [KP_ALLOW_MOUNT] = {"allow.mount", 0},
97 [KP_ALLOW_RAW_SOCKETS] = {"allow.raw_sockets", 0},
98 [KP_ALLOW_SET_HOSTNAME]= {"allow.set_hostname", 0},
99 [KP_ALLOW_SOCKET_AF] = {"allow.socket_af", 0},
100 [KP_ALLOW_SYSVIPC] = {"allow.sysvipc", 0},
101 [KP_DEVFS_RULESET] = {"devfs_ruleset", 0},
102 [KP_ENFORCE_STATFS] = {"enforce_statfs", 0},
103 [KP_HOST_HOSTNAME] = {"host.hostname", 0},
104#ifdef INET
105 [KP_IP4_ADDR] = {"ip4.addr", 0},
106#endif
107#ifdef INET6
108 [KP_IP6_ADDR] = {"ip6.addr", 0},
109#endif
110 [KP_JID] = {"jid", 0},
111 [KP_NAME] = {"name", 0},
112 [KP_PATH] = {"path", 0},
113 [KP_PERSIST] = {"persist", 0},
114 [KP_SECURELEVEL] = {"securelevel", 0},
115 [KP_VNET] = {"vnet", 0},
116};
117
118/*
119 * Parse the jail configuration file.
120 */
121void
122load_config(void)
123{
124 struct cfjails wild;
125 struct cfparams opp;
126 struct cfjail *j, *tj, *wj;
127 struct cfparam *p, *vp, *tp;
128 struct cfstring *s, *vs, *ns;
129 struct cfvar *v;
130 char *ep;
131 size_t varoff;
132 int did_self, jseq, pgen;
133
134 if (!strcmp(cfname, "-")) {
135 cfname = "STDIN";
136 yyin = stdin;
137 } else {
138 yyin = fopen(cfname, "r");
139 if (!yyin)
140 err(1, "%s", cfname);
141 }
142 if (yyparse() || yynerrs)
143 exit(1);
144
145 /* Separate the wildcard jails out from the actual jails. */
146 jseq = 0;
147 TAILQ_INIT(&wild);
148 TAILQ_FOREACH_SAFE(j, &cfjails, tq, tj) {
149 j->seq = ++jseq;
150 if (wild_jail_name(j->name))
151 requeue(j, &wild);
152 }
153
154 TAILQ_FOREACH(j, &cfjails, tq) {
155 /* Set aside the jail's parameters. */
156 TAILQ_INIT(&opp);
157 TAILQ_CONCAT(&opp, &j->params, tq);
158 /*
159 * The jail name implies its "name" or "jid" parameter,
160 * though they may also be explicitly set later on.
161 */
162 add_param(j, NULL,
163 strtol(j->name, &ep, 10) && !*ep ? KP_JID : KP_NAME,
164 j->name);
165 /*
166 * Collect parameters for the jail, global parameters/variables,
167 * and any matching wildcard jails.
168 */
169 did_self = 0;
170 TAILQ_FOREACH(wj, &wild, tq) {
171 if (j->seq < wj->seq && !did_self) {
172 TAILQ_FOREACH(p, &opp, tq)
173 add_param(j, p, 0, NULL);
174 did_self = 1;
175 }
176 if (wild_jail_match(j->name, wj->name))
177 TAILQ_FOREACH(p, &wj->params, tq)
178 add_param(j, p, 0, NULL);
179 }
180 if (!did_self)
181 TAILQ_FOREACH(p, &opp, tq)
182 add_param(j, p, 0, NULL);
183
184 /* Resolve any variable substitutions. */
185 pgen = 0;
186 TAILQ_FOREACH(p, &j->params, tq) {
187 p->gen = ++pgen;
188 find_vars:
189 TAILQ_FOREACH(s, &p->val, tq) {
190 varoff = 0;
191 while ((v = STAILQ_FIRST(&s->vars))) {
192 TAILQ_FOREACH(vp, &j->params, tq)
193 if (!strcmp(vp->name, v->name))
194 break;
195 if (!vp) {
196 jail_warnx(j,
197 "%s: variable \"%s\" not found",
198 p->name, v->name);
199 bad_var:
200 j->flags |= JF_FAILED;
201 TAILQ_FOREACH(vp, &j->params, tq)
202 if (vp->gen == pgen)
203 vp->flags |= PF_BAD;
204 goto free_var;
205 }
206 if (vp->flags & PF_BAD)
207 goto bad_var;
208 if (vp->gen == pgen) {
209 jail_warnx(j, "%s: variable loop",
210 v->name);
211 goto bad_var;
212 }
213 TAILQ_FOREACH(vs, &vp->val, tq)
214 if (!STAILQ_EMPTY(&vs->vars)) {
215 vp->gen = pgen;
216 TAILQ_REMOVE(&j->params, vp,
217 tq);
218 TAILQ_INSERT_BEFORE(p, vp, tq);
219 p = vp;
220 goto find_vars;
221 }
222 vs = TAILQ_FIRST(&vp->val);
223 if (TAILQ_NEXT(vs, tq) != NULL &&
224 (s->s[0] != '\0' ||
225 STAILQ_NEXT(v, tq))) {
226 jail_warnx(j, "%s: array cannot be "
227 "substituted inline",
228 p->name);
229 goto bad_var;
230 }
231 s->s = erealloc(s->s, s->len + vs->len + 1);
232 memmove(s->s + v->pos + varoff + vs->len,
233 s->s + v->pos + varoff,
234 s->len - (v->pos + varoff) + 1);
235 memcpy(s->s + v->pos + varoff, vs->s, vs->len);
236 varoff += vs->len;
237 s->len += vs->len;
238 while ((vs = TAILQ_NEXT(vs, tq))) {
239 ns = emalloc(sizeof(struct cfstring));
240 ns->s = estrdup(vs->s);
241 ns->len = vs->len;
242 STAILQ_INIT(&ns->vars);
243 TAILQ_INSERT_AFTER(&p->val, s, ns, tq);
244 s = ns;
245 }
246 free_var:
247 free(v->name);
248 STAILQ_REMOVE_HEAD(&s->vars, tq);
249 free(v);
250 }
251 }
252 }
253
254 /* Free the jail's original parameter list and any variables. */
255 while ((p = TAILQ_FIRST(&opp)))
256 free_param(&opp, p);
257 TAILQ_FOREACH_SAFE(p, &j->params, tq, tp)
258 if (p->flags & PF_VAR)
259 free_param(&j->params, p);
260 }
261 while ((wj = TAILQ_FIRST(&wild))) {
262 free(wj->name);
263 while ((p = TAILQ_FIRST(&wj->params)))
264 free_param(&wj->params, p);
265 TAILQ_REMOVE(&wild, wj, tq);
266 }
267}
268
269/*
270 * Create a new jail record.
271 */
272struct cfjail *
273add_jail(void)
274{
275 struct cfjail *j;
276
277 j = emalloc(sizeof(struct cfjail));
278 memset(j, 0, sizeof(struct cfjail));
279 TAILQ_INIT(&j->params);
280 STAILQ_INIT(&j->dep[DEP_FROM]);
281 STAILQ_INIT(&j->dep[DEP_TO]);
282 j->queue = &cfjails;
283 TAILQ_INSERT_TAIL(&cfjails, j, tq);
284 return j;
285}
286
287/*
288 * Add a parameter to a jail.
289 */
290void
291add_param(struct cfjail *j, const struct cfparam *p, enum intparam ipnum,
292 const char *value)
293{
294 struct cfstrings nss;
295 struct cfparam *dp, *np;
296 struct cfstring *s, *ns;
297 struct cfvar *v, *nv;
298 const char *name;
299 char *cs, *tname;
300 unsigned flags;
301
302 if (j == NULL) {
303 /* Create a single anonymous jail if one doesn't yet exist. */
304 j = TAILQ_LAST(&cfjails, cfjails);
305 if (j == NULL)
306 j = add_jail();
307 }
308 TAILQ_INIT(&nss);
309 if (p != NULL) {
310 name = p->name;
311 flags = p->flags;
312 /*
313 * Make a copy of the parameter's string list,
314 * which may be freed if it's overridden later.
315 */
316 TAILQ_FOREACH(s, &p->val, tq) {
317 ns = emalloc(sizeof(struct cfstring));
318 ns->s = estrdup(s->s);
319 ns->len = s->len;
320 STAILQ_INIT(&ns->vars);
321 STAILQ_FOREACH(v, &s->vars, tq) {
322 nv = emalloc(sizeof(struct cfvar));
323 nv->name = strdup(v->name);
324 nv->pos = v->pos;
325 STAILQ_INSERT_TAIL(&ns->vars, nv, tq);
326 }
327 TAILQ_INSERT_TAIL(&nss, ns, tq);
328 }
329 } else {
330 flags = PF_APPEND;
| 29
30#include <sys/types.h>
31#include <sys/errno.h>
32#include <sys/socket.h>
33#include <sys/sysctl.h>
34
35#include <arpa/inet.h>
36#include <netinet/in.h>
37
38#include <err.h>
39#include <netdb.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <string.h>
43#include <unistd.h>
44
45#include "jailp.h"
46
47struct ipspec {
48 const char *name;
49 unsigned flags;
50};
51
52extern FILE *yyin;
53extern int yynerrs;
54
55struct cfjails cfjails = TAILQ_HEAD_INITIALIZER(cfjails);
56
57static void free_param(struct cfparams *pp, struct cfparam *p);
58static void free_param_strings(struct cfparam *p);
59
60static const struct ipspec intparams[] = {
61 [IP_ALLOW_DYING] = {"allow.dying", PF_INTERNAL | PF_BOOL},
62 [IP_COMMAND] = {"command", PF_INTERNAL},
63 [IP_DEPEND] = {"depend", PF_INTERNAL},
64 [IP_EXEC_CLEAN] = {"exec.clean", PF_INTERNAL | PF_BOOL},
65 [IP_EXEC_CONSOLELOG] = {"exec.consolelog", PF_INTERNAL},
66 [IP_EXEC_FIB] = {"exec.fib", PF_INTERNAL | PF_INT},
67 [IP_EXEC_JAIL_USER] = {"exec.jail_user", PF_INTERNAL},
68 [IP_EXEC_POSTSTART] = {"exec.poststart", PF_INTERNAL},
69 [IP_EXEC_POSTSTOP] = {"exec.poststop", PF_INTERNAL},
70 [IP_EXEC_PRESTART] = {"exec.prestart", PF_INTERNAL},
71 [IP_EXEC_PRESTOP] = {"exec.prestop", PF_INTERNAL},
72 [IP_EXEC_START] = {"exec.start", PF_INTERNAL},
73 [IP_EXEC_STOP] = {"exec.stop", PF_INTERNAL},
74 [IP_EXEC_SYSTEM_JAIL_USER]= {"exec.system_jail_user",
75 PF_INTERNAL | PF_BOOL},
76 [IP_EXEC_SYSTEM_USER] = {"exec.system_user", PF_INTERNAL},
77 [IP_EXEC_TIMEOUT] = {"exec.timeout", PF_INTERNAL | PF_INT},
78#if defined(INET) || defined(INET6)
79 [IP_INTERFACE] = {"interface", PF_INTERNAL},
80 [IP_IP_HOSTNAME] = {"ip_hostname", PF_INTERNAL | PF_BOOL},
81#endif
82 [IP_MOUNT] = {"mount", PF_INTERNAL},
83 [IP_MOUNT_DEVFS] = {"mount.devfs", PF_INTERNAL | PF_BOOL},
84 [IP_MOUNT_FSTAB] = {"mount.fstab", PF_INTERNAL},
85 [IP_STOP_TIMEOUT] = {"stop.timeout", PF_INTERNAL | PF_INT},
86 [IP_VNET_INTERFACE] = {"vnet.interface", PF_INTERNAL},
87#ifdef INET
88 [IP__IP4_IFADDR] = {"ip4.addr", PF_INTERNAL | PF_CONV},
89#endif
90#ifdef INET6
91 [IP__IP6_IFADDR] = {"ip6.addr", PF_INTERNAL | PF_CONV},
92#endif
93 [IP__MOUNT_FROM_FSTAB] = {"mount.fstab", PF_INTERNAL | PF_CONV},
94 [IP__OP] = {NULL, PF_CONV},
95 [KP_ALLOW_CHFLAGS] = {"allow.chflags", 0},
96 [KP_ALLOW_MOUNT] = {"allow.mount", 0},
97 [KP_ALLOW_RAW_SOCKETS] = {"allow.raw_sockets", 0},
98 [KP_ALLOW_SET_HOSTNAME]= {"allow.set_hostname", 0},
99 [KP_ALLOW_SOCKET_AF] = {"allow.socket_af", 0},
100 [KP_ALLOW_SYSVIPC] = {"allow.sysvipc", 0},
101 [KP_DEVFS_RULESET] = {"devfs_ruleset", 0},
102 [KP_ENFORCE_STATFS] = {"enforce_statfs", 0},
103 [KP_HOST_HOSTNAME] = {"host.hostname", 0},
104#ifdef INET
105 [KP_IP4_ADDR] = {"ip4.addr", 0},
106#endif
107#ifdef INET6
108 [KP_IP6_ADDR] = {"ip6.addr", 0},
109#endif
110 [KP_JID] = {"jid", 0},
111 [KP_NAME] = {"name", 0},
112 [KP_PATH] = {"path", 0},
113 [KP_PERSIST] = {"persist", 0},
114 [KP_SECURELEVEL] = {"securelevel", 0},
115 [KP_VNET] = {"vnet", 0},
116};
117
118/*
119 * Parse the jail configuration file.
120 */
121void
122load_config(void)
123{
124 struct cfjails wild;
125 struct cfparams opp;
126 struct cfjail *j, *tj, *wj;
127 struct cfparam *p, *vp, *tp;
128 struct cfstring *s, *vs, *ns;
129 struct cfvar *v;
130 char *ep;
131 size_t varoff;
132 int did_self, jseq, pgen;
133
134 if (!strcmp(cfname, "-")) {
135 cfname = "STDIN";
136 yyin = stdin;
137 } else {
138 yyin = fopen(cfname, "r");
139 if (!yyin)
140 err(1, "%s", cfname);
141 }
142 if (yyparse() || yynerrs)
143 exit(1);
144
145 /* Separate the wildcard jails out from the actual jails. */
146 jseq = 0;
147 TAILQ_INIT(&wild);
148 TAILQ_FOREACH_SAFE(j, &cfjails, tq, tj) {
149 j->seq = ++jseq;
150 if (wild_jail_name(j->name))
151 requeue(j, &wild);
152 }
153
154 TAILQ_FOREACH(j, &cfjails, tq) {
155 /* Set aside the jail's parameters. */
156 TAILQ_INIT(&opp);
157 TAILQ_CONCAT(&opp, &j->params, tq);
158 /*
159 * The jail name implies its "name" or "jid" parameter,
160 * though they may also be explicitly set later on.
161 */
162 add_param(j, NULL,
163 strtol(j->name, &ep, 10) && !*ep ? KP_JID : KP_NAME,
164 j->name);
165 /*
166 * Collect parameters for the jail, global parameters/variables,
167 * and any matching wildcard jails.
168 */
169 did_self = 0;
170 TAILQ_FOREACH(wj, &wild, tq) {
171 if (j->seq < wj->seq && !did_self) {
172 TAILQ_FOREACH(p, &opp, tq)
173 add_param(j, p, 0, NULL);
174 did_self = 1;
175 }
176 if (wild_jail_match(j->name, wj->name))
177 TAILQ_FOREACH(p, &wj->params, tq)
178 add_param(j, p, 0, NULL);
179 }
180 if (!did_self)
181 TAILQ_FOREACH(p, &opp, tq)
182 add_param(j, p, 0, NULL);
183
184 /* Resolve any variable substitutions. */
185 pgen = 0;
186 TAILQ_FOREACH(p, &j->params, tq) {
187 p->gen = ++pgen;
188 find_vars:
189 TAILQ_FOREACH(s, &p->val, tq) {
190 varoff = 0;
191 while ((v = STAILQ_FIRST(&s->vars))) {
192 TAILQ_FOREACH(vp, &j->params, tq)
193 if (!strcmp(vp->name, v->name))
194 break;
195 if (!vp) {
196 jail_warnx(j,
197 "%s: variable \"%s\" not found",
198 p->name, v->name);
199 bad_var:
200 j->flags |= JF_FAILED;
201 TAILQ_FOREACH(vp, &j->params, tq)
202 if (vp->gen == pgen)
203 vp->flags |= PF_BAD;
204 goto free_var;
205 }
206 if (vp->flags & PF_BAD)
207 goto bad_var;
208 if (vp->gen == pgen) {
209 jail_warnx(j, "%s: variable loop",
210 v->name);
211 goto bad_var;
212 }
213 TAILQ_FOREACH(vs, &vp->val, tq)
214 if (!STAILQ_EMPTY(&vs->vars)) {
215 vp->gen = pgen;
216 TAILQ_REMOVE(&j->params, vp,
217 tq);
218 TAILQ_INSERT_BEFORE(p, vp, tq);
219 p = vp;
220 goto find_vars;
221 }
222 vs = TAILQ_FIRST(&vp->val);
223 if (TAILQ_NEXT(vs, tq) != NULL &&
224 (s->s[0] != '\0' ||
225 STAILQ_NEXT(v, tq))) {
226 jail_warnx(j, "%s: array cannot be "
227 "substituted inline",
228 p->name);
229 goto bad_var;
230 }
231 s->s = erealloc(s->s, s->len + vs->len + 1);
232 memmove(s->s + v->pos + varoff + vs->len,
233 s->s + v->pos + varoff,
234 s->len - (v->pos + varoff) + 1);
235 memcpy(s->s + v->pos + varoff, vs->s, vs->len);
236 varoff += vs->len;
237 s->len += vs->len;
238 while ((vs = TAILQ_NEXT(vs, tq))) {
239 ns = emalloc(sizeof(struct cfstring));
240 ns->s = estrdup(vs->s);
241 ns->len = vs->len;
242 STAILQ_INIT(&ns->vars);
243 TAILQ_INSERT_AFTER(&p->val, s, ns, tq);
244 s = ns;
245 }
246 free_var:
247 free(v->name);
248 STAILQ_REMOVE_HEAD(&s->vars, tq);
249 free(v);
250 }
251 }
252 }
253
254 /* Free the jail's original parameter list and any variables. */
255 while ((p = TAILQ_FIRST(&opp)))
256 free_param(&opp, p);
257 TAILQ_FOREACH_SAFE(p, &j->params, tq, tp)
258 if (p->flags & PF_VAR)
259 free_param(&j->params, p);
260 }
261 while ((wj = TAILQ_FIRST(&wild))) {
262 free(wj->name);
263 while ((p = TAILQ_FIRST(&wj->params)))
264 free_param(&wj->params, p);
265 TAILQ_REMOVE(&wild, wj, tq);
266 }
267}
268
269/*
270 * Create a new jail record.
271 */
272struct cfjail *
273add_jail(void)
274{
275 struct cfjail *j;
276
277 j = emalloc(sizeof(struct cfjail));
278 memset(j, 0, sizeof(struct cfjail));
279 TAILQ_INIT(&j->params);
280 STAILQ_INIT(&j->dep[DEP_FROM]);
281 STAILQ_INIT(&j->dep[DEP_TO]);
282 j->queue = &cfjails;
283 TAILQ_INSERT_TAIL(&cfjails, j, tq);
284 return j;
285}
286
287/*
288 * Add a parameter to a jail.
289 */
290void
291add_param(struct cfjail *j, const struct cfparam *p, enum intparam ipnum,
292 const char *value)
293{
294 struct cfstrings nss;
295 struct cfparam *dp, *np;
296 struct cfstring *s, *ns;
297 struct cfvar *v, *nv;
298 const char *name;
299 char *cs, *tname;
300 unsigned flags;
301
302 if (j == NULL) {
303 /* Create a single anonymous jail if one doesn't yet exist. */
304 j = TAILQ_LAST(&cfjails, cfjails);
305 if (j == NULL)
306 j = add_jail();
307 }
308 TAILQ_INIT(&nss);
309 if (p != NULL) {
310 name = p->name;
311 flags = p->flags;
312 /*
313 * Make a copy of the parameter's string list,
314 * which may be freed if it's overridden later.
315 */
316 TAILQ_FOREACH(s, &p->val, tq) {
317 ns = emalloc(sizeof(struct cfstring));
318 ns->s = estrdup(s->s);
319 ns->len = s->len;
320 STAILQ_INIT(&ns->vars);
321 STAILQ_FOREACH(v, &s->vars, tq) {
322 nv = emalloc(sizeof(struct cfvar));
323 nv->name = strdup(v->name);
324 nv->pos = v->pos;
325 STAILQ_INSERT_TAIL(&ns->vars, nv, tq);
326 }
327 TAILQ_INSERT_TAIL(&nss, ns, tq);
328 }
329 } else {
330 flags = PF_APPEND;
|
331 if (ipnum != 0) {
| 331 if (ipnum != IP__NULL) {
|
332 name = intparams[ipnum].name;
333 flags |= intparams[ipnum].flags;
334 } else if ((cs = strchr(value, '='))) {
335 tname = alloca(cs - value + 1);
336 strlcpy(tname, value, cs - value + 1);
337 name = tname;
338 value = cs + 1;
339 } else {
340 name = value;
341 value = NULL;
342 }
343 if (value != NULL) {
344 ns = emalloc(sizeof(struct cfstring));
345 ns->s = estrdup(value);
346 ns->len = strlen(value);
347 STAILQ_INIT(&ns->vars);
348 TAILQ_INSERT_TAIL(&nss, ns, tq);
349 }
350 }
351
352 /* See if this parameter has already been added. */
| 332 name = intparams[ipnum].name;
333 flags |= intparams[ipnum].flags;
334 } else if ((cs = strchr(value, '='))) {
335 tname = alloca(cs - value + 1);
336 strlcpy(tname, value, cs - value + 1);
337 name = tname;
338 value = cs + 1;
339 } else {
340 name = value;
341 value = NULL;
342 }
343 if (value != NULL) {
344 ns = emalloc(sizeof(struct cfstring));
345 ns->s = estrdup(value);
346 ns->len = strlen(value);
347 STAILQ_INIT(&ns->vars);
348 TAILQ_INSERT_TAIL(&nss, ns, tq);
349 }
350 }
351
352 /* See if this parameter has already been added. */
|
353 if (ipnum != 0)
| 353 if (ipnum != IP__NULL)
|
354 dp = j->intparams[ipnum];
355 else
356 TAILQ_FOREACH(dp, &j->params, tq)
357 if (!(dp->flags & PF_CONV) && equalopts(dp->name, name))
358 break;
359 if (dp != NULL) {
360 /* Found it - append or replace. */
361 if (strcmp(dp->name, name)) {
362 free(dp->name);
363 dp->name = estrdup(name);
364 }
365 if (!(flags & PF_APPEND) || TAILQ_EMPTY(&nss))
366 free_param_strings(dp);
367 TAILQ_CONCAT(&dp->val, &nss, tq);
368 dp->flags |= flags;
369 } else {
370 /* Not found - add it. */
371 np = emalloc(sizeof(struct cfparam));
372 np->name = estrdup(name);
373 TAILQ_INIT(&np->val);
374 TAILQ_CONCAT(&np->val, &nss, tq);
375 np->flags = flags;
376 np->gen = 0;
377 TAILQ_INSERT_TAIL(&j->params, np, tq);
| 354 dp = j->intparams[ipnum];
355 else
356 TAILQ_FOREACH(dp, &j->params, tq)
357 if (!(dp->flags & PF_CONV) && equalopts(dp->name, name))
358 break;
359 if (dp != NULL) {
360 /* Found it - append or replace. */
361 if (strcmp(dp->name, name)) {
362 free(dp->name);
363 dp->name = estrdup(name);
364 }
365 if (!(flags & PF_APPEND) || TAILQ_EMPTY(&nss))
366 free_param_strings(dp);
367 TAILQ_CONCAT(&dp->val, &nss, tq);
368 dp->flags |= flags;
369 } else {
370 /* Not found - add it. */
371 np = emalloc(sizeof(struct cfparam));
372 np->name = estrdup(name);
373 TAILQ_INIT(&np->val);
374 TAILQ_CONCAT(&np->val, &nss, tq);
375 np->flags = flags;
376 np->gen = 0;
377 TAILQ_INSERT_TAIL(&j->params, np, tq);
|
378 if (ipnum != 0)
| 378 if (ipnum != IP__NULL)
|
379 j->intparams[ipnum] = np;
380 else
| 379 j->intparams[ipnum] = np;
380 else
|
381 for (ipnum = 1; ipnum < IP_NPARAM; ipnum++)
| 381 for (ipnum = IP__NULL + 1; ipnum < IP_NPARAM; ipnum++)
|
382 if (!(intparams[ipnum].flags & PF_CONV) &&
383 equalopts(name, intparams[ipnum].name)) {
384 j->intparams[ipnum] = np;
385 np->flags |= intparams[ipnum].flags;
386 break;
387 }
388 }
389}
390
391/*
392 * Return if a boolean parameter exists and is true.
393 */
394int
395bool_param(const struct cfparam *p)
396{
397 const char *cs;
398
399 if (p == NULL)
400 return 0;
401 cs = strrchr(p->name, '.');
402 return !strncmp(cs ? cs + 1 : p->name, "no", 2) ^
403 (TAILQ_EMPTY(&p->val) ||
404 !strcasecmp(TAILQ_LAST(&p->val, cfstrings)->s, "true") ||
405 (strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10)));
406}
407
408/*
409 * Set an integer if a parameter if it exists.
410 */
411int
412int_param(const struct cfparam *p, int *ip)
413{
414 if (p == NULL || TAILQ_EMPTY(&p->val))
415 return 0;
416 *ip = strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10);
417 return 1;
418}
419
420/*
421 * Return the string value of a scalar parameter if it exists.
422 */
423const char *
424string_param(const struct cfparam *p)
425{
426 return (p && !TAILQ_EMPTY(&p->val)
427 ? TAILQ_LAST(&p->val, cfstrings)->s : NULL);
428}
429
430/*
431 * Check syntax and values of internal parameters. Set some internal
432 * parameters based on the values of others.
433 */
434int
435check_intparams(struct cfjail *j)
436{
437 struct cfparam *p;
438 struct cfstring *s;
439 FILE *f;
440 const char *val;
441 char *cs, *ep, *ln;
442 size_t lnlen;
443 int error;
444#if defined(INET) || defined(INET6)
445 struct addrinfo hints;
446 struct addrinfo *ai0, *ai;
447 const char *hostname;
448 int gicode, defif, prefix;
449#endif
450#ifdef INET
451 struct in_addr addr4;
452 int ip4ok;
453 char avalue4[INET_ADDRSTRLEN];
454#endif
455#ifdef INET6
456 struct in6_addr addr6;
457 int ip6ok;
458 char avalue6[INET6_ADDRSTRLEN];
459#endif
460
461 error = 0;
462 /* Check format of boolan and integer values. */
463 TAILQ_FOREACH(p, &j->params, tq) {
464 if (!TAILQ_EMPTY(&p->val) && (p->flags & (PF_BOOL | PF_INT))) {
465 val = TAILQ_LAST(&p->val, cfstrings)->s;
466 if (p->flags & PF_BOOL) {
467 if (strcasecmp(val, "false") &&
468 strcasecmp(val, "true") &&
469 ((void)strtol(val, &ep, 10), *ep)) {
470 jail_warnx(j,
471 "%s: unknown boolean value \"%s\"",
472 p->name, val);
473 error = -1;
474 }
475 } else {
476 (void)strtol(val, &ep, 10);
477 if (ep == val || *ep) {
478 jail_warnx(j,
479 "%s: non-integer value \"%s\"",
480 p->name, val);
481 error = -1;
482 }
483 }
484 }
485 }
486
487#if defined(INET) || defined(INET6)
488 /*
489 * The ip_hostname parameter looks up the hostname, and adds parameters
490 * for any IP addresses it finds.
491 */
492 if (((j->flags & JF_OP_MASK) != JF_STOP ||
493 j->intparams[IP_INTERFACE] != NULL) &&
494 bool_param(j->intparams[IP_IP_HOSTNAME]) &&
495 (hostname = string_param(j->intparams[KP_HOST_HOSTNAME]))) {
496 j->intparams[IP_IP_HOSTNAME] = NULL;
497 /*
498 * Silently ignore unsupported address families from
499 * DNS lookups.
500 */
501#ifdef INET
502 ip4ok = feature_present("inet");
503#endif
504#ifdef INET6
505 ip6ok = feature_present("inet6");
506#endif
507 if (
508#if defined(INET) && defined(INET6)
509 ip4ok || ip6ok
510#elif defined(INET)
511 ip4ok
512#elif defined(INET6)
513 ip6ok
514#endif
515 ) {
516 /* Look up the hostname (or get the address) */
517 memset(&hints, 0, sizeof(hints));
518 hints.ai_socktype = SOCK_STREAM;
519 hints.ai_family =
520#if defined(INET) && defined(INET6)
521 ip4ok ? (ip6ok ? PF_UNSPEC : PF_INET) : PF_INET6;
522#elif defined(INET)
523 PF_INET;
524#elif defined(INET6)
525 PF_INET6;
526#endif
527 gicode = getaddrinfo(hostname, NULL, &hints, &ai0);
528 if (gicode != 0) {
529 jail_warnx(j, "host.hostname %s: %s", hostname,
530 gai_strerror(gicode));
531 error = -1;
532 } else {
533 /*
534 * Convert the addresses to ASCII so jailparam
535 * can convert them back. Errors are not
536 * expected here.
537 */
538 for (ai = ai0; ai; ai = ai->ai_next)
539 switch (ai->ai_family) {
540#ifdef INET
541 case AF_INET:
542 memcpy(&addr4,
543 &((struct sockaddr_in *)
544 (void *)ai->ai_addr)->
545 sin_addr, sizeof(addr4));
546 if (inet_ntop(AF_INET,
547 &addr4, avalue4,
548 INET_ADDRSTRLEN) == NULL)
549 err(1, "inet_ntop");
550 add_param(j, NULL, KP_IP4_ADDR,
551 avalue4);
552 break;
553#endif
554#ifdef INET6
555 case AF_INET6:
556 memcpy(&addr6,
557 &((struct sockaddr_in6 *)
558 (void *)ai->ai_addr)->
559 sin6_addr, sizeof(addr6));
560 if (inet_ntop(AF_INET6,
561 &addr6, avalue6,
562 INET6_ADDRSTRLEN) == NULL)
563 err(1, "inet_ntop");
564 add_param(j, NULL, KP_IP6_ADDR,
565 avalue6);
566 break;
567#endif
568 }
569 freeaddrinfo(ai0);
570 }
571 }
572 }
573
574 /*
575 * IP addresses may include an interface to set that address on,
576 * and a netmask/suffix for that address.
577 */
578 defif = string_param(j->intparams[IP_INTERFACE]) != NULL;
579#ifdef INET
580 if (j->intparams[KP_IP4_ADDR] != NULL) {
581 TAILQ_FOREACH(s, &j->intparams[KP_IP4_ADDR]->val, tq) {
582 cs = strchr(s->s, '|');
583 if (cs || defif)
584 add_param(j, NULL, IP__IP4_IFADDR, s->s);
585 if (cs) {
586 strcpy(s->s, cs + 1);
587 s->len -= cs + 1 - s->s;
588 }
589 if ((cs = strchr(s->s, '/'))) {
590 prefix = strtol(cs + 1, &ep, 10);
591 if (*ep == '.'
592 ? inet_pton(AF_INET, cs + 1, &addr4) != 1
593 : *ep || prefix < 0 || prefix > 32) {
594 jail_warnx(j,
595 "ip4.addr: bad netmask \"%s\"", cs);
596 error = -1;
597 }
598 *cs = '\0';
599 s->len = cs - s->s + 1;
600 }
601 }
602 }
603#endif
604#ifdef INET6
605 if (j->intparams[KP_IP6_ADDR] != NULL) {
606 TAILQ_FOREACH(s, &j->intparams[KP_IP6_ADDR]->val, tq) {
607 cs = strchr(s->s, '|');
608 if (cs || defif)
609 add_param(j, NULL, IP__IP6_IFADDR, s->s);
610 if (cs) {
611 strcpy(s->s, cs + 1);
612 s->len -= cs + 1 - s->s;
613 }
614 if ((cs = strchr(s->s, '/'))) {
615 prefix = strtol(cs + 1, &ep, 10);
616 if (*ep || prefix < 0 || prefix > 128) {
617 jail_warnx(j,
618 "ip6.addr: bad prefixlen \"%s\"",
619 cs);
620 error = -1;
621 }
622 *cs = '\0';
623 s->len = cs - s->s + 1;
624 }
625 }
626 }
627#endif
628#endif
629
630 /*
631 * Read mount.fstab file(s), and treat each line as its own mount
632 * parameter.
633 */
634 if (j->intparams[IP_MOUNT_FSTAB] != NULL) {
635 TAILQ_FOREACH(s, &j->intparams[IP_MOUNT_FSTAB]->val, tq) {
636 if (s->len == 0)
637 continue;
638 f = fopen(s->s, "r");
639 if (f == NULL) {
640 jail_warnx(j, "mount.fstab: %s: %s",
641 s->s, strerror(errno));
642 error = -1;
643 continue;
644 }
645 while ((ln = fgetln(f, &lnlen))) {
646 if ((cs = memchr(ln, '#', lnlen - 1)))
647 lnlen = cs - ln + 1;
648 if (ln[lnlen - 1] == '\n' ||
649 ln[lnlen - 1] == '#')
650 ln[lnlen - 1] = '\0';
651 else {
652 cs = alloca(lnlen + 1);
653 strlcpy(cs, ln, lnlen + 1);
654 ln = cs;
655 }
656 add_param(j, NULL, IP__MOUNT_FROM_FSTAB, ln);
657 }
658 fclose(f);
659 }
660 }
661 if (error)
662 failed(j);
663 return error;
664}
665
666/*
667 * Import parameters into libjail's binary jailparam format.
668 */
669int
670import_params(struct cfjail *j)
671{
672 struct cfparam *p;
673 struct cfstring *s, *ts;
674 struct jailparam *jp;
675 char *value, *cs;
676 size_t vallen;
677 int error;
678
679 error = 0;
680 j->njp = 0;
681 TAILQ_FOREACH(p, &j->params, tq)
682 if (!(p->flags & PF_INTERNAL))
683 j->njp++;
684 j->jp = jp = emalloc(j->njp * sizeof(struct jailparam));
685 TAILQ_FOREACH(p, &j->params, tq) {
686 if (p->flags & PF_INTERNAL)
687 continue;
688 if (jailparam_init(jp, p->name) < 0) {
689 error = -1;
690 jail_warnx(j, "%s", jail_errmsg);
691 continue;
692 }
693 if (TAILQ_EMPTY(&p->val))
694 value = NULL;
695 else if (!jp->jp_elemlen ||
696 !TAILQ_NEXT(TAILQ_FIRST(&p->val), tq)) {
697 /*
698 * Scalar parameters silently discard multiple (array)
699 * values, keeping only the last value added. This
700 * lets values added from the command line append to
701 * arrays wthout pre-checking the type.
702 */
703 value = TAILQ_LAST(&p->val, cfstrings)->s;
704 } else {
705 /*
706 * Convert arrays into comma-separated strings, which
707 * jailparam_import will then convert back into arrays.
708 */
709 vallen = 0;
710 TAILQ_FOREACH(s, &p->val, tq)
711 vallen += s->len + 1;
712 value = alloca(vallen);
713 cs = value;
714 TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) {
715 strcpy(cs, s->s);
716 if (ts != NULL) {
717 cs += s->len + 1;
718 cs[-1] = ',';
719 }
720 }
721 }
722 if (jailparam_import(jp, value) < 0) {
723 error = -1;
724 jail_warnx(j, "%s", jail_errmsg);
725 }
726 jp++;
727 }
728 if (error) {
729 jailparam_free(j->jp, j->njp);
730 free(j->jp);
731 j->jp = NULL;
732 failed(j);
733 }
734 return error;
735}
736
737/*
738 * Check if options are equal (with or without the "no" prefix).
739 */
740int
741equalopts(const char *opt1, const char *opt2)
742{
743 char *p;
744
745 /* "opt" vs. "opt" or "noopt" vs. "noopt" */
746 if (strcmp(opt1, opt2) == 0)
747 return (1);
748 /* "noopt" vs. "opt" */
749 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0)
750 return (1);
751 /* "opt" vs. "noopt" */
752 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0)
753 return (1);
754 while ((p = strchr(opt1, '.')) != NULL &&
755 !strncmp(opt1, opt2, ++p - opt1)) {
756 opt2 += p - opt1;
757 opt1 = p;
758 /* "foo.noopt" vs. "foo.opt" */
759 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0)
760 return (1);
761 /* "foo.opt" vs. "foo.noopt" */
762 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0)
763 return (1);
764 }
765 return (0);
766}
767
768/*
769 * See if a jail name matches a wildcard.
770 */
771int
772wild_jail_match(const char *jname, const char *wname)
773{
774 const char *jc, *jd, *wc, *wd;
775
776 /*
777 * A non-final "*" component in the wild name matches a single jail
778 * component, and a final "*" matches one or more jail components.
779 */
780 for (jc = jname, wc = wname;
781 (jd = strchr(jc, '.')) && (wd = strchr(wc, '.'));
782 jc = jd + 1, wc = wd + 1)
783 if (strncmp(jc, wc, jd - jc + 1) && strncmp(wc, "*.", 2))
784 return 0;
785 return (!strcmp(jc, wc) || !strcmp(wc, "*"));
786}
787
788/*
789 * Return if a jail name is a wildcard.
790 */
791int
792wild_jail_name(const char *wname)
793{
794 const char *wc;
795
796 for (wc = strchr(wname, '*'); wc; wc = strchr(wc + 1, '*'))
797 if ((wc == wname || wc[-1] == '.') &&
798 (wc[1] == '\0' || wc[1] == '.'))
799 return 1;
800 return 0;
801}
802
803/*
804 * Free a parameter record and all its strings and variables.
805 */
806static void
807free_param(struct cfparams *pp, struct cfparam *p)
808{
809 free(p->name);
810 free_param_strings(p);
811 TAILQ_REMOVE(pp, p, tq);
812 free(p);
813}
814
815static void
816free_param_strings(struct cfparam *p)
817{
818 struct cfstring *s;
819 struct cfvar *v;
820
821 while ((s = TAILQ_FIRST(&p->val))) {
822 free(s->s);
823 while ((v = STAILQ_FIRST(&s->vars))) {
824 free(v->name);
825 STAILQ_REMOVE_HEAD(&s->vars, tq);
826 free(v);
827 }
828 TAILQ_REMOVE(&p->val, s, tq);
829 free(s);
830 }
831}
| 382 if (!(intparams[ipnum].flags & PF_CONV) &&
383 equalopts(name, intparams[ipnum].name)) {
384 j->intparams[ipnum] = np;
385 np->flags |= intparams[ipnum].flags;
386 break;
387 }
388 }
389}
390
391/*
392 * Return if a boolean parameter exists and is true.
393 */
394int
395bool_param(const struct cfparam *p)
396{
397 const char *cs;
398
399 if (p == NULL)
400 return 0;
401 cs = strrchr(p->name, '.');
402 return !strncmp(cs ? cs + 1 : p->name, "no", 2) ^
403 (TAILQ_EMPTY(&p->val) ||
404 !strcasecmp(TAILQ_LAST(&p->val, cfstrings)->s, "true") ||
405 (strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10)));
406}
407
408/*
409 * Set an integer if a parameter if it exists.
410 */
411int
412int_param(const struct cfparam *p, int *ip)
413{
414 if (p == NULL || TAILQ_EMPTY(&p->val))
415 return 0;
416 *ip = strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10);
417 return 1;
418}
419
420/*
421 * Return the string value of a scalar parameter if it exists.
422 */
423const char *
424string_param(const struct cfparam *p)
425{
426 return (p && !TAILQ_EMPTY(&p->val)
427 ? TAILQ_LAST(&p->val, cfstrings)->s : NULL);
428}
429
430/*
431 * Check syntax and values of internal parameters. Set some internal
432 * parameters based on the values of others.
433 */
434int
435check_intparams(struct cfjail *j)
436{
437 struct cfparam *p;
438 struct cfstring *s;
439 FILE *f;
440 const char *val;
441 char *cs, *ep, *ln;
442 size_t lnlen;
443 int error;
444#if defined(INET) || defined(INET6)
445 struct addrinfo hints;
446 struct addrinfo *ai0, *ai;
447 const char *hostname;
448 int gicode, defif, prefix;
449#endif
450#ifdef INET
451 struct in_addr addr4;
452 int ip4ok;
453 char avalue4[INET_ADDRSTRLEN];
454#endif
455#ifdef INET6
456 struct in6_addr addr6;
457 int ip6ok;
458 char avalue6[INET6_ADDRSTRLEN];
459#endif
460
461 error = 0;
462 /* Check format of boolan and integer values. */
463 TAILQ_FOREACH(p, &j->params, tq) {
464 if (!TAILQ_EMPTY(&p->val) && (p->flags & (PF_BOOL | PF_INT))) {
465 val = TAILQ_LAST(&p->val, cfstrings)->s;
466 if (p->flags & PF_BOOL) {
467 if (strcasecmp(val, "false") &&
468 strcasecmp(val, "true") &&
469 ((void)strtol(val, &ep, 10), *ep)) {
470 jail_warnx(j,
471 "%s: unknown boolean value \"%s\"",
472 p->name, val);
473 error = -1;
474 }
475 } else {
476 (void)strtol(val, &ep, 10);
477 if (ep == val || *ep) {
478 jail_warnx(j,
479 "%s: non-integer value \"%s\"",
480 p->name, val);
481 error = -1;
482 }
483 }
484 }
485 }
486
487#if defined(INET) || defined(INET6)
488 /*
489 * The ip_hostname parameter looks up the hostname, and adds parameters
490 * for any IP addresses it finds.
491 */
492 if (((j->flags & JF_OP_MASK) != JF_STOP ||
493 j->intparams[IP_INTERFACE] != NULL) &&
494 bool_param(j->intparams[IP_IP_HOSTNAME]) &&
495 (hostname = string_param(j->intparams[KP_HOST_HOSTNAME]))) {
496 j->intparams[IP_IP_HOSTNAME] = NULL;
497 /*
498 * Silently ignore unsupported address families from
499 * DNS lookups.
500 */
501#ifdef INET
502 ip4ok = feature_present("inet");
503#endif
504#ifdef INET6
505 ip6ok = feature_present("inet6");
506#endif
507 if (
508#if defined(INET) && defined(INET6)
509 ip4ok || ip6ok
510#elif defined(INET)
511 ip4ok
512#elif defined(INET6)
513 ip6ok
514#endif
515 ) {
516 /* Look up the hostname (or get the address) */
517 memset(&hints, 0, sizeof(hints));
518 hints.ai_socktype = SOCK_STREAM;
519 hints.ai_family =
520#if defined(INET) && defined(INET6)
521 ip4ok ? (ip6ok ? PF_UNSPEC : PF_INET) : PF_INET6;
522#elif defined(INET)
523 PF_INET;
524#elif defined(INET6)
525 PF_INET6;
526#endif
527 gicode = getaddrinfo(hostname, NULL, &hints, &ai0);
528 if (gicode != 0) {
529 jail_warnx(j, "host.hostname %s: %s", hostname,
530 gai_strerror(gicode));
531 error = -1;
532 } else {
533 /*
534 * Convert the addresses to ASCII so jailparam
535 * can convert them back. Errors are not
536 * expected here.
537 */
538 for (ai = ai0; ai; ai = ai->ai_next)
539 switch (ai->ai_family) {
540#ifdef INET
541 case AF_INET:
542 memcpy(&addr4,
543 &((struct sockaddr_in *)
544 (void *)ai->ai_addr)->
545 sin_addr, sizeof(addr4));
546 if (inet_ntop(AF_INET,
547 &addr4, avalue4,
548 INET_ADDRSTRLEN) == NULL)
549 err(1, "inet_ntop");
550 add_param(j, NULL, KP_IP4_ADDR,
551 avalue4);
552 break;
553#endif
554#ifdef INET6
555 case AF_INET6:
556 memcpy(&addr6,
557 &((struct sockaddr_in6 *)
558 (void *)ai->ai_addr)->
559 sin6_addr, sizeof(addr6));
560 if (inet_ntop(AF_INET6,
561 &addr6, avalue6,
562 INET6_ADDRSTRLEN) == NULL)
563 err(1, "inet_ntop");
564 add_param(j, NULL, KP_IP6_ADDR,
565 avalue6);
566 break;
567#endif
568 }
569 freeaddrinfo(ai0);
570 }
571 }
572 }
573
574 /*
575 * IP addresses may include an interface to set that address on,
576 * and a netmask/suffix for that address.
577 */
578 defif = string_param(j->intparams[IP_INTERFACE]) != NULL;
579#ifdef INET
580 if (j->intparams[KP_IP4_ADDR] != NULL) {
581 TAILQ_FOREACH(s, &j->intparams[KP_IP4_ADDR]->val, tq) {
582 cs = strchr(s->s, '|');
583 if (cs || defif)
584 add_param(j, NULL, IP__IP4_IFADDR, s->s);
585 if (cs) {
586 strcpy(s->s, cs + 1);
587 s->len -= cs + 1 - s->s;
588 }
589 if ((cs = strchr(s->s, '/'))) {
590 prefix = strtol(cs + 1, &ep, 10);
591 if (*ep == '.'
592 ? inet_pton(AF_INET, cs + 1, &addr4) != 1
593 : *ep || prefix < 0 || prefix > 32) {
594 jail_warnx(j,
595 "ip4.addr: bad netmask \"%s\"", cs);
596 error = -1;
597 }
598 *cs = '\0';
599 s->len = cs - s->s + 1;
600 }
601 }
602 }
603#endif
604#ifdef INET6
605 if (j->intparams[KP_IP6_ADDR] != NULL) {
606 TAILQ_FOREACH(s, &j->intparams[KP_IP6_ADDR]->val, tq) {
607 cs = strchr(s->s, '|');
608 if (cs || defif)
609 add_param(j, NULL, IP__IP6_IFADDR, s->s);
610 if (cs) {
611 strcpy(s->s, cs + 1);
612 s->len -= cs + 1 - s->s;
613 }
614 if ((cs = strchr(s->s, '/'))) {
615 prefix = strtol(cs + 1, &ep, 10);
616 if (*ep || prefix < 0 || prefix > 128) {
617 jail_warnx(j,
618 "ip6.addr: bad prefixlen \"%s\"",
619 cs);
620 error = -1;
621 }
622 *cs = '\0';
623 s->len = cs - s->s + 1;
624 }
625 }
626 }
627#endif
628#endif
629
630 /*
631 * Read mount.fstab file(s), and treat each line as its own mount
632 * parameter.
633 */
634 if (j->intparams[IP_MOUNT_FSTAB] != NULL) {
635 TAILQ_FOREACH(s, &j->intparams[IP_MOUNT_FSTAB]->val, tq) {
636 if (s->len == 0)
637 continue;
638 f = fopen(s->s, "r");
639 if (f == NULL) {
640 jail_warnx(j, "mount.fstab: %s: %s",
641 s->s, strerror(errno));
642 error = -1;
643 continue;
644 }
645 while ((ln = fgetln(f, &lnlen))) {
646 if ((cs = memchr(ln, '#', lnlen - 1)))
647 lnlen = cs - ln + 1;
648 if (ln[lnlen - 1] == '\n' ||
649 ln[lnlen - 1] == '#')
650 ln[lnlen - 1] = '\0';
651 else {
652 cs = alloca(lnlen + 1);
653 strlcpy(cs, ln, lnlen + 1);
654 ln = cs;
655 }
656 add_param(j, NULL, IP__MOUNT_FROM_FSTAB, ln);
657 }
658 fclose(f);
659 }
660 }
661 if (error)
662 failed(j);
663 return error;
664}
665
666/*
667 * Import parameters into libjail's binary jailparam format.
668 */
669int
670import_params(struct cfjail *j)
671{
672 struct cfparam *p;
673 struct cfstring *s, *ts;
674 struct jailparam *jp;
675 char *value, *cs;
676 size_t vallen;
677 int error;
678
679 error = 0;
680 j->njp = 0;
681 TAILQ_FOREACH(p, &j->params, tq)
682 if (!(p->flags & PF_INTERNAL))
683 j->njp++;
684 j->jp = jp = emalloc(j->njp * sizeof(struct jailparam));
685 TAILQ_FOREACH(p, &j->params, tq) {
686 if (p->flags & PF_INTERNAL)
687 continue;
688 if (jailparam_init(jp, p->name) < 0) {
689 error = -1;
690 jail_warnx(j, "%s", jail_errmsg);
691 continue;
692 }
693 if (TAILQ_EMPTY(&p->val))
694 value = NULL;
695 else if (!jp->jp_elemlen ||
696 !TAILQ_NEXT(TAILQ_FIRST(&p->val), tq)) {
697 /*
698 * Scalar parameters silently discard multiple (array)
699 * values, keeping only the last value added. This
700 * lets values added from the command line append to
701 * arrays wthout pre-checking the type.
702 */
703 value = TAILQ_LAST(&p->val, cfstrings)->s;
704 } else {
705 /*
706 * Convert arrays into comma-separated strings, which
707 * jailparam_import will then convert back into arrays.
708 */
709 vallen = 0;
710 TAILQ_FOREACH(s, &p->val, tq)
711 vallen += s->len + 1;
712 value = alloca(vallen);
713 cs = value;
714 TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) {
715 strcpy(cs, s->s);
716 if (ts != NULL) {
717 cs += s->len + 1;
718 cs[-1] = ',';
719 }
720 }
721 }
722 if (jailparam_import(jp, value) < 0) {
723 error = -1;
724 jail_warnx(j, "%s", jail_errmsg);
725 }
726 jp++;
727 }
728 if (error) {
729 jailparam_free(j->jp, j->njp);
730 free(j->jp);
731 j->jp = NULL;
732 failed(j);
733 }
734 return error;
735}
736
737/*
738 * Check if options are equal (with or without the "no" prefix).
739 */
740int
741equalopts(const char *opt1, const char *opt2)
742{
743 char *p;
744
745 /* "opt" vs. "opt" or "noopt" vs. "noopt" */
746 if (strcmp(opt1, opt2) == 0)
747 return (1);
748 /* "noopt" vs. "opt" */
749 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0)
750 return (1);
751 /* "opt" vs. "noopt" */
752 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0)
753 return (1);
754 while ((p = strchr(opt1, '.')) != NULL &&
755 !strncmp(opt1, opt2, ++p - opt1)) {
756 opt2 += p - opt1;
757 opt1 = p;
758 /* "foo.noopt" vs. "foo.opt" */
759 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0)
760 return (1);
761 /* "foo.opt" vs. "foo.noopt" */
762 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0)
763 return (1);
764 }
765 return (0);
766}
767
768/*
769 * See if a jail name matches a wildcard.
770 */
771int
772wild_jail_match(const char *jname, const char *wname)
773{
774 const char *jc, *jd, *wc, *wd;
775
776 /*
777 * A non-final "*" component in the wild name matches a single jail
778 * component, and a final "*" matches one or more jail components.
779 */
780 for (jc = jname, wc = wname;
781 (jd = strchr(jc, '.')) && (wd = strchr(wc, '.'));
782 jc = jd + 1, wc = wd + 1)
783 if (strncmp(jc, wc, jd - jc + 1) && strncmp(wc, "*.", 2))
784 return 0;
785 return (!strcmp(jc, wc) || !strcmp(wc, "*"));
786}
787
788/*
789 * Return if a jail name is a wildcard.
790 */
791int
792wild_jail_name(const char *wname)
793{
794 const char *wc;
795
796 for (wc = strchr(wname, '*'); wc; wc = strchr(wc + 1, '*'))
797 if ((wc == wname || wc[-1] == '.') &&
798 (wc[1] == '\0' || wc[1] == '.'))
799 return 1;
800 return 0;
801}
802
803/*
804 * Free a parameter record and all its strings and variables.
805 */
806static void
807free_param(struct cfparams *pp, struct cfparam *p)
808{
809 free(p->name);
810 free_param_strings(p);
811 TAILQ_REMOVE(pp, p, tq);
812 free(p);
813}
814
815static void
816free_param_strings(struct cfparam *p)
817{
818 struct cfstring *s;
819 struct cfvar *v;
820
821 while ((s = TAILQ_FIRST(&p->val))) {
822 free(s->s);
823 while ((v = STAILQ_FIRST(&s->vars))) {
824 free(v->name);
825 STAILQ_REMOVE_HEAD(&s->vars, tq);
826 free(v);
827 }
828 TAILQ_REMOVE(&p->val, s, tq);
829 free(s);
830 }
831}
|