1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2011 James Gritton
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD: stable/12/usr.sbin/jail/config.c 370033 2021-06-24 17:54:49Z jamie $");
31
32 #include <sys/types.h>
33 #include <sys/errno.h>
34 #include <sys/socket.h>
35 #include <sys/sysctl.h>
36
37 #include <arpa/inet.h>
38 #include <netinet/in.h>
39
40 #include <err.h>
41 #include <netdb.h>
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <string.h>
45 #include <unistd.h>
46
47 #include "jailp.h"
48
49 struct ipspec {
50 const char *name;
51 unsigned flags;
52 };
53
54 extern FILE *yyin;
55 extern int yynerrs;
56
57 extern int yyparse(void);
58
59 struct cfjails cfjails = TAILQ_HEAD_INITIALIZER(cfjails);
60
61 static void free_param(struct cfparams *pp, struct cfparam *p);
62 static void free_param_strings(struct cfparam *p);
63
64 static const struct ipspec intparams[] = {
65 [IP_ALLOW_DYING] = {"allow.dying", PF_INTERNAL | PF_BOOL},
66 [IP_COMMAND] = {"command", PF_INTERNAL},
67 [IP_DEPEND] = {"depend", PF_INTERNAL},
68 [IP_EXEC_CLEAN] = {"exec.clean", PF_INTERNAL | PF_BOOL},
69 [IP_EXEC_CONSOLELOG] = {"exec.consolelog", PF_INTERNAL},
70 [IP_EXEC_FIB] = {"exec.fib", PF_INTERNAL | PF_INT},
71 [IP_EXEC_JAIL_USER] = {"exec.jail_user", PF_INTERNAL},
72 [IP_EXEC_POSTSTART] = {"exec.poststart", PF_INTERNAL},
73 [IP_EXEC_POSTSTOP] = {"exec.poststop", PF_INTERNAL},
74 [IP_EXEC_PREPARE] = {"exec.prepare", PF_INTERNAL},
75 [IP_EXEC_PRESTART] = {"exec.prestart", PF_INTERNAL},
76 [IP_EXEC_PRESTOP] = {"exec.prestop", PF_INTERNAL},
77 [IP_EXEC_RELEASE] = {"exec.release", PF_INTERNAL},
78 [IP_EXEC_CREATED] = {"exec.created", PF_INTERNAL},
79 [IP_EXEC_START] = {"exec.start", PF_INTERNAL},
80 [IP_EXEC_STOP] = {"exec.stop", PF_INTERNAL},
81 [IP_EXEC_SYSTEM_JAIL_USER]= {"exec.system_jail_user",
82 PF_INTERNAL | PF_BOOL},
83 [IP_EXEC_SYSTEM_USER] = {"exec.system_user", PF_INTERNAL},
84 [IP_EXEC_TIMEOUT] = {"exec.timeout", PF_INTERNAL | PF_INT},
85 #if defined(INET) || defined(INET6)
86 [IP_INTERFACE] = {"interface", PF_INTERNAL},
87 [IP_IP_HOSTNAME] = {"ip_hostname", PF_INTERNAL | PF_BOOL},
88 #endif
89 [IP_MOUNT] = {"mount", PF_INTERNAL | PF_REV},
90 [IP_MOUNT_DEVFS] = {"mount.devfs", PF_INTERNAL | PF_BOOL},
91 [IP_MOUNT_FDESCFS] = {"mount.fdescfs", PF_INTERNAL | PF_BOOL},
92 [IP_MOUNT_PROCFS] = {"mount.procfs", PF_INTERNAL | PF_BOOL},
93 [IP_MOUNT_FSTAB] = {"mount.fstab", PF_INTERNAL},
94 [IP_STOP_TIMEOUT] = {"stop.timeout", PF_INTERNAL | PF_INT},
95 [IP_VNET_INTERFACE] = {"vnet.interface", PF_INTERNAL},
96 #ifdef INET
97 [IP__IP4_IFADDR] = {"ip4.addr", PF_INTERNAL | PF_CONV | PF_REV},
98 #endif
99 #ifdef INET6
100 [IP__IP6_IFADDR] = {"ip6.addr", PF_INTERNAL | PF_CONV | PF_REV},
101 #endif
102 [IP__MOUNT_FROM_FSTAB] = {"mount.fstab", PF_INTERNAL | PF_CONV | PF_REV},
103 [IP__OP] = {NULL, PF_CONV},
104 [KP_ALLOW_CHFLAGS] = {"allow.chflags", 0},
105 [KP_ALLOW_MOUNT] = {"allow.mount", 0},
106 [KP_ALLOW_RAW_SOCKETS] = {"allow.raw_sockets", 0},
107 [KP_ALLOW_SET_HOSTNAME]= {"allow.set_hostname", 0},
108 [KP_ALLOW_SOCKET_AF] = {"allow.socket_af", 0},
109 [KP_ALLOW_SYSVIPC] = {"allow.sysvipc", 0},
110 [KP_DEVFS_RULESET] = {"devfs_ruleset", 0},
111 [KP_HOST_HOSTNAME] = {"host.hostname", 0},
112 #ifdef INET
113 [KP_IP4_ADDR] = {"ip4.addr", 0},
114 #endif
115 #ifdef INET6
116 [KP_IP6_ADDR] = {"ip6.addr", 0},
117 #endif
118 [KP_JID] = {"jid", PF_IMMUTABLE},
119 [KP_NAME] = {"name", PF_IMMUTABLE},
120 [KP_PATH] = {"path", 0},
121 [KP_PERSIST] = {"persist", 0},
122 [KP_SECURELEVEL] = {"securelevel", 0},
123 [KP_VNET] = {"vnet", 0},
124 };
125
126 /*
127 * Parse the jail configuration file.
128 */
129 void
load_config(void)130 load_config(void)
131 {
132 struct cfjails wild;
133 struct cfparams opp;
134 struct cfjail *j, *tj, *wj;
135 struct cfparam *p, *vp, *tp;
136 struct cfstring *s, *vs, *ns;
137 struct cfvar *v, *vv;
138 char *ep;
139 int did_self, jseq, pgen;
140
141 if (!strcmp(cfname, "-")) {
142 cfname = "STDIN";
143 yyin = stdin;
144 } else {
145 yyin = fopen(cfname, "r");
146 if (!yyin)
147 err(1, "%s", cfname);
148 }
149 if (yyparse() || yynerrs)
150 exit(1);
151
152 /* Separate the wildcard jails out from the actual jails. */
153 jseq = 0;
154 TAILQ_INIT(&wild);
155 TAILQ_FOREACH_SAFE(j, &cfjails, tq, tj) {
156 j->seq = ++jseq;
157 if (wild_jail_name(j->name))
158 requeue(j, &wild);
159 }
160
161 TAILQ_FOREACH(j, &cfjails, tq) {
162 /* Set aside the jail's parameters. */
163 TAILQ_INIT(&opp);
164 TAILQ_CONCAT(&opp, &j->params, tq);
165 /*
166 * The jail name implies its "name" or "jid" parameter,
167 * though they may also be explicitly set later on.
168 */
169 add_param(j, NULL,
170 strtol(j->name, &ep, 10) && !*ep ? KP_JID : KP_NAME,
171 j->name);
172 /*
173 * Collect parameters for the jail, global parameters/variables,
174 * and any matching wildcard jails.
175 */
176 did_self = 0;
177 TAILQ_FOREACH(wj, &wild, tq) {
178 if (j->seq < wj->seq && !did_self) {
179 TAILQ_FOREACH(p, &opp, tq)
180 add_param(j, p, 0, NULL);
181 did_self = 1;
182 }
183 if (wild_jail_match(j->name, wj->name))
184 TAILQ_FOREACH(p, &wj->params, tq)
185 add_param(j, p, 0, NULL);
186 }
187 if (!did_self)
188 TAILQ_FOREACH(p, &opp, tq)
189 add_param(j, p, 0, NULL);
190
191 /* Resolve any variable substitutions. */
192 pgen = 0;
193 TAILQ_FOREACH(p, &j->params, tq) {
194 p->gen = ++pgen;
195 find_vars:
196 TAILQ_FOREACH(s, &p->val, tq) {
197 while ((v = STAILQ_FIRST(&s->vars))) {
198 TAILQ_FOREACH(vp, &j->params, tq)
199 if (!strcmp(vp->name, v->name))
200 break;
201 if (!vp || TAILQ_EMPTY(&vp->val)) {
202 jail_warnx(j,
203 "%s: variable \"%s\" not found",
204 p->name, v->name);
205 bad_var:
206 j->flags |= JF_FAILED;
207 TAILQ_FOREACH(vp, &j->params, tq)
208 if (vp->gen == pgen)
209 vp->flags |= PF_BAD;
210 goto free_var;
211 }
212 if (vp->flags & PF_BAD)
213 goto bad_var;
214 if (vp->gen == pgen) {
215 jail_warnx(j, "%s: variable loop",
216 v->name);
217 goto bad_var;
218 }
219 TAILQ_FOREACH(vs, &vp->val, tq)
220 if (!STAILQ_EMPTY(&vs->vars)) {
221 vp->gen = pgen;
222 TAILQ_REMOVE(&j->params, vp,
223 tq);
224 TAILQ_INSERT_BEFORE(p, vp, tq);
225 p = vp;
226 goto find_vars;
227 }
228 vs = TAILQ_FIRST(&vp->val);
229 if (TAILQ_NEXT(vs, tq) != NULL &&
230 (s->s[0] != '\0' ||
231 STAILQ_NEXT(v, tq))) {
232 jail_warnx(j, "%s: array cannot be "
233 "substituted inline",
234 p->name);
235 goto bad_var;
236 }
237 s->s = erealloc(s->s, s->len + vs->len + 1);
238 memmove(s->s + v->pos + vs->len,
239 s->s + v->pos,
240 s->len - v->pos + 1);
241 memcpy(s->s + v->pos, vs->s, vs->len);
242 vv = v;
243 while ((vv = STAILQ_NEXT(vv, tq)))
244 vv->pos += vs->len;
245 s->len += vs->len;
246 while ((vs = TAILQ_NEXT(vs, tq))) {
247 ns = emalloc(sizeof(struct cfstring));
248 ns->s = estrdup(vs->s);
249 ns->len = vs->len;
250 STAILQ_INIT(&ns->vars);
251 TAILQ_INSERT_AFTER(&p->val, s, ns, tq);
252 s = ns;
253 }
254 free_var:
255 free(v->name);
256 STAILQ_REMOVE_HEAD(&s->vars, tq);
257 free(v);
258 }
259 }
260 }
261
262 /* Free the jail's original parameter list and any variables. */
263 while ((p = TAILQ_FIRST(&opp)))
264 free_param(&opp, p);
265 TAILQ_FOREACH_SAFE(p, &j->params, tq, tp)
266 if (p->flags & PF_VAR)
267 free_param(&j->params, p);
268 }
269 while ((wj = TAILQ_FIRST(&wild))) {
270 free(wj->name);
271 while ((p = TAILQ_FIRST(&wj->params)))
272 free_param(&wj->params, p);
273 TAILQ_REMOVE(&wild, wj, tq);
274 }
275 }
276
277 /*
278 * Create a new jail record.
279 */
280 struct cfjail *
add_jail(void)281 add_jail(void)
282 {
283 struct cfjail *j;
284
285 j = emalloc(sizeof(struct cfjail));
286 memset(j, 0, sizeof(struct cfjail));
287 TAILQ_INIT(&j->params);
288 STAILQ_INIT(&j->dep[DEP_FROM]);
289 STAILQ_INIT(&j->dep[DEP_TO]);
290 j->queue = &cfjails;
291 TAILQ_INSERT_TAIL(&cfjails, j, tq);
292 return j;
293 }
294
295 /*
296 * Add a parameter to a jail.
297 */
298 void
add_param(struct cfjail * j,const struct cfparam * p,enum intparam ipnum,const char * value)299 add_param(struct cfjail *j, const struct cfparam *p, enum intparam ipnum,
300 const char *value)
301 {
302 struct cfstrings nss;
303 struct cfparam *dp, *np;
304 struct cfstring *s, *ns;
305 struct cfvar *v, *nv;
306 const char *name;
307 char *cs, *tname;
308 unsigned flags;
309
310 if (j == NULL) {
311 /* Create a single anonymous jail if one doesn't yet exist. */
312 j = TAILQ_LAST(&cfjails, cfjails);
313 if (j == NULL)
314 j = add_jail();
315 }
316 TAILQ_INIT(&nss);
317 if (p != NULL) {
318 name = p->name;
319 flags = p->flags;
320 /*
321 * Make a copy of the parameter's string list,
322 * which may be freed if it's overridden later.
323 */
324 TAILQ_FOREACH(s, &p->val, tq) {
325 ns = emalloc(sizeof(struct cfstring));
326 ns->s = estrdup(s->s);
327 ns->len = s->len;
328 STAILQ_INIT(&ns->vars);
329 STAILQ_FOREACH(v, &s->vars, tq) {
330 nv = emalloc(sizeof(struct cfvar));
331 nv->name = strdup(v->name);
332 nv->pos = v->pos;
333 STAILQ_INSERT_TAIL(&ns->vars, nv, tq);
334 }
335 TAILQ_INSERT_TAIL(&nss, ns, tq);
336 }
337 } else {
338 flags = PF_APPEND;
339 if (ipnum != IP__NULL) {
340 name = intparams[ipnum].name;
341 flags |= intparams[ipnum].flags;
342 } else if ((cs = strchr(value, '='))) {
343 tname = alloca(cs - value + 1);
344 strlcpy(tname, value, cs - value + 1);
345 name = tname;
346 value = cs + 1;
347 } else {
348 name = value;
349 value = NULL;
350 }
351 if (value != NULL) {
352 ns = emalloc(sizeof(struct cfstring));
353 ns->s = estrdup(value);
354 ns->len = strlen(value);
355 STAILQ_INIT(&ns->vars);
356 TAILQ_INSERT_TAIL(&nss, ns, tq);
357 }
358 }
359
360 /* See if this parameter has already been added. */
361 if (ipnum != IP__NULL)
362 dp = j->intparams[ipnum];
363 else
364 TAILQ_FOREACH(dp, &j->params, tq)
365 if (!(dp->flags & PF_CONV) && equalopts(dp->name, name))
366 break;
367 if (dp != NULL) {
368 /* Found it - append or replace. */
369 if ((flags ^ dp->flags) & PF_VAR) {
370 jail_warnx(j, "variable \"$%s\" cannot have the same "
371 "name as a parameter.", name);
372 return;
373 }
374 if (dp->flags & PF_IMMUTABLE) {
375 jail_warnx(j, "cannot redefine parameter \"%s\".",
376 dp->name);
377 return;
378 }
379 if (strcmp(dp->name, name)) {
380 free(dp->name);
381 dp->name = estrdup(name);
382 }
383 if (!(flags & PF_APPEND) || TAILQ_EMPTY(&nss))
384 free_param_strings(dp);
385 TAILQ_CONCAT(&dp->val, &nss, tq);
386 dp->flags |= flags;
387 } else {
388 /* Not found - add it. */
389 np = emalloc(sizeof(struct cfparam));
390 np->name = estrdup(name);
391 TAILQ_INIT(&np->val);
392 TAILQ_CONCAT(&np->val, &nss, tq);
393 np->flags = flags;
394 np->gen = 0;
395 TAILQ_INSERT_TAIL(&j->params, np, tq);
396 if (ipnum != IP__NULL)
397 j->intparams[ipnum] = np;
398 else
399 for (ipnum = IP__NULL + 1; ipnum < IP_NPARAM; ipnum++)
400 if (!(intparams[ipnum].flags & PF_CONV) &&
401 equalopts(name, intparams[ipnum].name)) {
402 if (flags & PF_VAR) {
403 jail_warnx(j,
404 "variable \"$%s\" "
405 "cannot have the same "
406 "name as a parameter.",
407 name);
408 return;
409 }
410 j->intparams[ipnum] = np;
411 np->flags |= intparams[ipnum].flags;
412 break;
413 }
414 }
415 }
416
417 /*
418 * Return if a boolean parameter exists and is true.
419 */
420 int
bool_param(const struct cfparam * p)421 bool_param(const struct cfparam *p)
422 {
423 const char *cs;
424
425 if (p == NULL)
426 return 0;
427 cs = strrchr(p->name, '.');
428 return !strncmp(cs ? cs + 1 : p->name, "no", 2) ^
429 (TAILQ_EMPTY(&p->val) ||
430 !strcasecmp(TAILQ_LAST(&p->val, cfstrings)->s, "true") ||
431 (strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10)));
432 }
433
434 /*
435 * Set an integer if a parameter if it exists.
436 */
437 int
int_param(const struct cfparam * p,int * ip)438 int_param(const struct cfparam *p, int *ip)
439 {
440 if (p == NULL || TAILQ_EMPTY(&p->val))
441 return 0;
442 *ip = strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10);
443 return 1;
444 }
445
446 /*
447 * Return the string value of a scalar parameter if it exists.
448 */
449 const char *
string_param(const struct cfparam * p)450 string_param(const struct cfparam *p)
451 {
452 return (p && !TAILQ_EMPTY(&p->val)
453 ? TAILQ_LAST(&p->val, cfstrings)->s : NULL);
454 }
455
456 /*
457 * Check syntax and values of internal parameters. Set some internal
458 * parameters based on the values of others.
459 */
460 int
check_intparams(struct cfjail * j)461 check_intparams(struct cfjail *j)
462 {
463 struct cfparam *p;
464 struct cfstring *s;
465 FILE *f;
466 const char *val;
467 char *cs, *ep, *ln;
468 size_t lnlen;
469 int error;
470 #if defined(INET) || defined(INET6)
471 struct addrinfo hints;
472 struct addrinfo *ai0, *ai;
473 const char *hostname;
474 int gicode, defif;
475 #endif
476 #ifdef INET
477 struct in_addr addr4;
478 int ip4ok;
479 char avalue4[INET_ADDRSTRLEN];
480 #endif
481 #ifdef INET6
482 struct in6_addr addr6;
483 int ip6ok;
484 char avalue6[INET6_ADDRSTRLEN];
485 #endif
486
487 error = 0;
488 /* Check format of boolan and integer values. */
489 TAILQ_FOREACH(p, &j->params, tq) {
490 if (!TAILQ_EMPTY(&p->val) && (p->flags & (PF_BOOL | PF_INT))) {
491 val = TAILQ_LAST(&p->val, cfstrings)->s;
492 if (p->flags & PF_BOOL) {
493 if (strcasecmp(val, "false") &&
494 strcasecmp(val, "true") &&
495 ((void)strtol(val, &ep, 10), *ep)) {
496 jail_warnx(j,
497 "%s: unknown boolean value \"%s\"",
498 p->name, val);
499 error = -1;
500 }
501 } else {
502 (void)strtol(val, &ep, 10);
503 if (ep == val || *ep) {
504 jail_warnx(j,
505 "%s: non-integer value \"%s\"",
506 p->name, val);
507 error = -1;
508 }
509 }
510 }
511 }
512
513 #if defined(INET) || defined(INET6)
514 /*
515 * The ip_hostname parameter looks up the hostname, and adds parameters
516 * for any IP addresses it finds.
517 */
518 if (((j->flags & JF_OP_MASK) != JF_STOP ||
519 j->intparams[IP_INTERFACE] != NULL) &&
520 bool_param(j->intparams[IP_IP_HOSTNAME]) &&
521 (hostname = string_param(j->intparams[KP_HOST_HOSTNAME]))) {
522 j->intparams[IP_IP_HOSTNAME] = NULL;
523 /*
524 * Silently ignore unsupported address families from
525 * DNS lookups.
526 */
527 #ifdef INET
528 ip4ok = feature_present("inet");
529 #endif
530 #ifdef INET6
531 ip6ok = feature_present("inet6");
532 #endif
533 if (
534 #if defined(INET) && defined(INET6)
535 ip4ok || ip6ok
536 #elif defined(INET)
537 ip4ok
538 #elif defined(INET6)
539 ip6ok
540 #endif
541 ) {
542 /* Look up the hostname (or get the address) */
543 memset(&hints, 0, sizeof(hints));
544 hints.ai_socktype = SOCK_STREAM;
545 hints.ai_family =
546 #if defined(INET) && defined(INET6)
547 ip4ok ? (ip6ok ? PF_UNSPEC : PF_INET) : PF_INET6;
548 #elif defined(INET)
549 PF_INET;
550 #elif defined(INET6)
551 PF_INET6;
552 #endif
553 gicode = getaddrinfo(hostname, NULL, &hints, &ai0);
554 if (gicode != 0) {
555 jail_warnx(j, "host.hostname %s: %s", hostname,
556 gai_strerror(gicode));
557 error = -1;
558 } else {
559 /*
560 * Convert the addresses to ASCII so jailparam
561 * can convert them back. Errors are not
562 * expected here.
563 */
564 for (ai = ai0; ai; ai = ai->ai_next)
565 switch (ai->ai_family) {
566 #ifdef INET
567 case AF_INET:
568 memcpy(&addr4,
569 &((struct sockaddr_in *)
570 (void *)ai->ai_addr)->
571 sin_addr, sizeof(addr4));
572 if (inet_ntop(AF_INET,
573 &addr4, avalue4,
574 INET_ADDRSTRLEN) == NULL)
575 err(1, "inet_ntop");
576 add_param(j, NULL, KP_IP4_ADDR,
577 avalue4);
578 break;
579 #endif
580 #ifdef INET6
581 case AF_INET6:
582 memcpy(&addr6,
583 &((struct sockaddr_in6 *)
584 (void *)ai->ai_addr)->
585 sin6_addr, sizeof(addr6));
586 if (inet_ntop(AF_INET6,
587 &addr6, avalue6,
588 INET6_ADDRSTRLEN) == NULL)
589 err(1, "inet_ntop");
590 add_param(j, NULL, KP_IP6_ADDR,
591 avalue6);
592 break;
593 #endif
594 }
595 freeaddrinfo(ai0);
596 }
597 }
598 }
599
600 /*
601 * IP addresses may include an interface to set that address on,
602 * a netmask/suffix for that address and options for ifconfig.
603 * These are copied to an internal command parameter and then stripped
604 * so they won't be passed on to jailparam_set.
605 */
606 defif = string_param(j->intparams[IP_INTERFACE]) != NULL;
607 #ifdef INET
608 if (j->intparams[KP_IP4_ADDR] != NULL) {
609 TAILQ_FOREACH(s, &j->intparams[KP_IP4_ADDR]->val, tq) {
610 cs = strchr(s->s, '|');
611 if (cs || defif)
612 add_param(j, NULL, IP__IP4_IFADDR, s->s);
613 if (cs) {
614 strcpy(s->s, cs + 1);
615 s->len -= cs + 1 - s->s;
616 }
617 if ((cs = strchr(s->s, '/')) != NULL) {
618 *cs = '\0';
619 s->len = cs - s->s;
620 }
621 if ((cs = strchr(s->s, ' ')) != NULL) {
622 *cs = '\0';
623 s->len = cs - s->s;
624 }
625 }
626 }
627 #endif
628 #ifdef INET6
629 if (j->intparams[KP_IP6_ADDR] != NULL) {
630 TAILQ_FOREACH(s, &j->intparams[KP_IP6_ADDR]->val, tq) {
631 cs = strchr(s->s, '|');
632 if (cs || defif)
633 add_param(j, NULL, IP__IP6_IFADDR, s->s);
634 if (cs) {
635 strcpy(s->s, cs + 1);
636 s->len -= cs + 1 - s->s;
637 }
638 if ((cs = strchr(s->s, '/')) != NULL) {
639 *cs = '\0';
640 s->len = cs - s->s;
641 }
642 if ((cs = strchr(s->s, ' ')) != NULL) {
643 *cs = '\0';
644 s->len = cs - s->s;
645 }
646 }
647 }
648 #endif
649 #endif
650
651 /*
652 * Read mount.fstab file(s), and treat each line as its own mount
653 * parameter.
654 */
655 if (j->intparams[IP_MOUNT_FSTAB] != NULL) {
656 TAILQ_FOREACH(s, &j->intparams[IP_MOUNT_FSTAB]->val, tq) {
657 if (s->len == 0)
658 continue;
659 f = fopen(s->s, "r");
660 if (f == NULL) {
661 jail_warnx(j, "mount.fstab: %s: %s",
662 s->s, strerror(errno));
663 error = -1;
664 continue;
665 }
666 while ((ln = fgetln(f, &lnlen))) {
667 if ((cs = memchr(ln, '#', lnlen - 1)))
668 lnlen = cs - ln + 1;
669 if (ln[lnlen - 1] == '\n' ||
670 ln[lnlen - 1] == '#')
671 ln[lnlen - 1] = '\0';
672 else {
673 cs = alloca(lnlen + 1);
674 strlcpy(cs, ln, lnlen + 1);
675 ln = cs;
676 }
677 add_param(j, NULL, IP__MOUNT_FROM_FSTAB, ln);
678 }
679 fclose(f);
680 }
681 }
682 if (error)
683 failed(j);
684 return error;
685 }
686
687 /*
688 * Import parameters into libjail's binary jailparam format.
689 */
690 int
import_params(struct cfjail * j)691 import_params(struct cfjail *j)
692 {
693 struct cfparam *p;
694 struct cfstring *s, *ts;
695 struct jailparam *jp;
696 char *value, *cs;
697 size_t vallen;
698 int error;
699
700 error = 0;
701 j->njp = 0;
702 TAILQ_FOREACH(p, &j->params, tq)
703 if (!(p->flags & PF_INTERNAL))
704 j->njp++;
705 j->jp = jp = emalloc(j->njp * sizeof(struct jailparam));
706 TAILQ_FOREACH(p, &j->params, tq) {
707 if (p->flags & PF_INTERNAL)
708 continue;
709 if (jailparam_init(jp, p->name) < 0) {
710 error = -1;
711 jail_warnx(j, "%s", jail_errmsg);
712 jp++;
713 continue;
714 }
715 if (TAILQ_EMPTY(&p->val))
716 value = NULL;
717 else if (!jp->jp_elemlen ||
718 !TAILQ_NEXT(TAILQ_FIRST(&p->val), tq)) {
719 /*
720 * Scalar parameters silently discard multiple (array)
721 * values, keeping only the last value added. This
722 * lets values added from the command line append to
723 * arrays wthout pre-checking the type.
724 */
725 value = TAILQ_LAST(&p->val, cfstrings)->s;
726 } else {
727 /*
728 * Convert arrays into comma-separated strings, which
729 * jailparam_import will then convert back into arrays.
730 */
731 vallen = 0;
732 TAILQ_FOREACH(s, &p->val, tq)
733 vallen += s->len + 1;
734 value = alloca(vallen);
735 cs = value;
736 TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) {
737 memcpy(cs, s->s, s->len);
738 cs += s->len + 1;
739 cs[-1] = ',';
740 }
741 value[vallen - 1] = '\0';
742 }
743 if (jailparam_import(jp, value) < 0) {
744 error = -1;
745 jail_warnx(j, "%s", jail_errmsg);
746 }
747 jp++;
748 }
749 if (error) {
750 jailparam_free(j->jp, j->njp);
751 free(j->jp);
752 j->jp = NULL;
753 failed(j);
754 }
755 return error;
756 }
757
758 /*
759 * Check if options are equal (with or without the "no" prefix).
760 */
761 int
equalopts(const char * opt1,const char * opt2)762 equalopts(const char *opt1, const char *opt2)
763 {
764 char *p;
765
766 /* "opt" vs. "opt" or "noopt" vs. "noopt" */
767 if (strcmp(opt1, opt2) == 0)
768 return (1);
769 /* "noopt" vs. "opt" */
770 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0)
771 return (1);
772 /* "opt" vs. "noopt" */
773 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0)
774 return (1);
775 while ((p = strchr(opt1, '.')) != NULL &&
776 !strncmp(opt1, opt2, ++p - opt1)) {
777 opt2 += p - opt1;
778 opt1 = p;
779 /* "foo.noopt" vs. "foo.opt" */
780 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0)
781 return (1);
782 /* "foo.opt" vs. "foo.noopt" */
783 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0)
784 return (1);
785 }
786 return (0);
787 }
788
789 /*
790 * See if a jail name matches a wildcard.
791 */
792 int
wild_jail_match(const char * jname,const char * wname)793 wild_jail_match(const char *jname, const char *wname)
794 {
795 const char *jc, *jd, *wc, *wd;
796
797 /*
798 * A non-final "*" component in the wild name matches a single jail
799 * component, and a final "*" matches one or more jail components.
800 */
801 for (jc = jname, wc = wname;
802 (jd = strchr(jc, '.')) && (wd = strchr(wc, '.'));
803 jc = jd + 1, wc = wd + 1)
804 if (strncmp(jc, wc, jd - jc + 1) && strncmp(wc, "*.", 2))
805 return 0;
806 return (!strcmp(jc, wc) || !strcmp(wc, "*"));
807 }
808
809 /*
810 * Return if a jail name is a wildcard.
811 */
812 int
wild_jail_name(const char * wname)813 wild_jail_name(const char *wname)
814 {
815 const char *wc;
816
817 for (wc = strchr(wname, '*'); wc; wc = strchr(wc + 1, '*'))
818 if ((wc == wname || wc[-1] == '.') &&
819 (wc[1] == '\0' || wc[1] == '.'))
820 return 1;
821 return 0;
822 }
823
824 /*
825 * Free a parameter record and all its strings and variables.
826 */
827 static void
free_param(struct cfparams * pp,struct cfparam * p)828 free_param(struct cfparams *pp, struct cfparam *p)
829 {
830 free(p->name);
831 free_param_strings(p);
832 TAILQ_REMOVE(pp, p, tq);
833 free(p);
834 }
835
836 static void
free_param_strings(struct cfparam * p)837 free_param_strings(struct cfparam *p)
838 {
839 struct cfstring *s;
840 struct cfvar *v;
841
842 while ((s = TAILQ_FIRST(&p->val))) {
843 free(s->s);
844 while ((v = STAILQ_FIRST(&s->vars))) {
845 free(v->name);
846 STAILQ_REMOVE_HEAD(&s->vars, tq);
847 free(v);
848 }
849 TAILQ_REMOVE(&p->val, s, tq);
850 free(s);
851 }
852 }
853