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("$FreeBSD$");
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 \"$%s\" cannot have the same "
371 "name as a parameter.", name);
372 j->flags |= JF_FAILED;
373 return;
374 }
375 if (dp->flags & PF_IMMUTABLE) {
376 jail_warnx(j, "cannot redefine parameter \"%s\".",
377 dp->name);
378 j->flags |= JF_FAILED;
379 return;
380 }
381 if (strcmp(dp->name, name)) {
382 free(dp->name);
383 dp->name = estrdup(name);
384 }
385 if (!(flags & PF_APPEND) || TAILQ_EMPTY(&nss))
386 free_param_strings(dp);
387 TAILQ_CONCAT(&dp->val, &nss, tq);
388 dp->flags |= flags;
389 } else {
390 /* Not found - add it. */
391 np = emalloc(sizeof(struct cfparam));
392 np->name = estrdup(name);
393 TAILQ_INIT(&np->val);
394 TAILQ_CONCAT(&np->val, &nss, tq);
395 np->flags = flags;
396 np->gen = 0;
397 TAILQ_INSERT_TAIL(&j->params, np, tq);
398 if (ipnum != IP__NULL)
399 j->intparams[ipnum] = np;
400 else
401 for (ipnum = IP__NULL + 1; ipnum < IP_NPARAM; ipnum++)
402 if (!(intparams[ipnum].flags & PF_CONV) &&
403 equalopts(name, intparams[ipnum].name)) {
404 if (flags & PF_VAR) {
405 jail_warnx(j,
406 "variable \"$%s\" "
407 "cannot have the same "
408 "name as a parameter.",
409 name);
410 j->flags |= JF_FAILED;
411 return;
412 }
413 j->intparams[ipnum] = np;
414 np->flags |= intparams[ipnum].flags;
415 break;
416 }
417 }
418 }
419
420 /*
421 * Return if a boolean parameter exists and is true.
422 */
423 int
bool_param(const struct cfparam * p)424 bool_param(const struct cfparam *p)
425 {
426 const char *cs;
427
428 if (p == NULL)
429 return 0;
430 cs = strrchr(p->name, '.');
431 return !strncmp(cs ? cs + 1 : p->name, "no", 2) ^
432 (TAILQ_EMPTY(&p->val) ||
433 !strcasecmp(TAILQ_LAST(&p->val, cfstrings)->s, "true") ||
434 (strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10)));
435 }
436
437 /*
438 * Set an integer if a parameter if it exists.
439 */
440 int
int_param(const struct cfparam * p,int * ip)441 int_param(const struct cfparam *p, int *ip)
442 {
443 if (p == NULL || TAILQ_EMPTY(&p->val))
444 return 0;
445 *ip = strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10);
446 return 1;
447 }
448
449 /*
450 * Return the string value of a scalar parameter if it exists.
451 */
452 const char *
string_param(const struct cfparam * p)453 string_param(const struct cfparam *p)
454 {
455 return (p && !TAILQ_EMPTY(&p->val)
456 ? TAILQ_LAST(&p->val, cfstrings)->s : NULL);
457 }
458
459 /*
460 * Check syntax and values of internal parameters. Set some internal
461 * parameters based on the values of others.
462 */
463 int
check_intparams(struct cfjail * j)464 check_intparams(struct cfjail *j)
465 {
466 struct cfparam *p;
467 struct cfstring *s;
468 FILE *f;
469 const char *val;
470 char *cs, *ep, *ln;
471 size_t lnlen;
472 int error;
473 #if defined(INET) || defined(INET6)
474 struct addrinfo hints;
475 struct addrinfo *ai0, *ai;
476 const char *hostname;
477 int gicode, defif;
478 #endif
479 #ifdef INET
480 struct in_addr addr4;
481 int ip4ok;
482 char avalue4[INET_ADDRSTRLEN];
483 #endif
484 #ifdef INET6
485 struct in6_addr addr6;
486 int ip6ok;
487 char avalue6[INET6_ADDRSTRLEN];
488 #endif
489
490 error = 0;
491 /* Check format of boolan and integer values. */
492 TAILQ_FOREACH(p, &j->params, tq) {
493 if (!TAILQ_EMPTY(&p->val) && (p->flags & (PF_BOOL | PF_INT))) {
494 val = TAILQ_LAST(&p->val, cfstrings)->s;
495 if (p->flags & PF_BOOL) {
496 if (strcasecmp(val, "false") &&
497 strcasecmp(val, "true") &&
498 ((void)strtol(val, &ep, 10), *ep)) {
499 jail_warnx(j,
500 "%s: unknown boolean value \"%s\"",
501 p->name, val);
502 error = -1;
503 }
504 } else {
505 (void)strtol(val, &ep, 10);
506 if (ep == val || *ep) {
507 jail_warnx(j,
508 "%s: non-integer value \"%s\"",
509 p->name, val);
510 error = -1;
511 }
512 }
513 }
514 }
515
516 #if defined(INET) || defined(INET6)
517 /*
518 * The ip_hostname parameter looks up the hostname, and adds parameters
519 * for any IP addresses it finds.
520 */
521 if (((j->flags & JF_OP_MASK) != JF_STOP ||
522 j->intparams[IP_INTERFACE] != NULL) &&
523 bool_param(j->intparams[IP_IP_HOSTNAME]) &&
524 (hostname = string_param(j->intparams[KP_HOST_HOSTNAME]))) {
525 j->intparams[IP_IP_HOSTNAME] = NULL;
526 /*
527 * Silently ignore unsupported address families from
528 * DNS lookups.
529 */
530 #ifdef INET
531 ip4ok = feature_present("inet");
532 #endif
533 #ifdef INET6
534 ip6ok = feature_present("inet6");
535 #endif
536 if (
537 #if defined(INET) && defined(INET6)
538 ip4ok || ip6ok
539 #elif defined(INET)
540 ip4ok
541 #elif defined(INET6)
542 ip6ok
543 #endif
544 ) {
545 /* Look up the hostname (or get the address) */
546 memset(&hints, 0, sizeof(hints));
547 hints.ai_socktype = SOCK_STREAM;
548 hints.ai_family =
549 #if defined(INET) && defined(INET6)
550 ip4ok ? (ip6ok ? PF_UNSPEC : PF_INET) : PF_INET6;
551 #elif defined(INET)
552 PF_INET;
553 #elif defined(INET6)
554 PF_INET6;
555 #endif
556 gicode = getaddrinfo(hostname, NULL, &hints, &ai0);
557 if (gicode != 0) {
558 jail_warnx(j, "host.hostname %s: %s", hostname,
559 gai_strerror(gicode));
560 error = -1;
561 } else {
562 /*
563 * Convert the addresses to ASCII so jailparam
564 * can convert them back. Errors are not
565 * expected here.
566 */
567 for (ai = ai0; ai; ai = ai->ai_next)
568 switch (ai->ai_family) {
569 #ifdef INET
570 case AF_INET:
571 memcpy(&addr4,
572 &((struct sockaddr_in *)
573 (void *)ai->ai_addr)->
574 sin_addr, sizeof(addr4));
575 if (inet_ntop(AF_INET,
576 &addr4, avalue4,
577 INET_ADDRSTRLEN) == NULL)
578 err(1, "inet_ntop");
579 add_param(j, NULL, KP_IP4_ADDR,
580 avalue4);
581 break;
582 #endif
583 #ifdef INET6
584 case AF_INET6:
585 memcpy(&addr6,
586 &((struct sockaddr_in6 *)
587 (void *)ai->ai_addr)->
588 sin6_addr, sizeof(addr6));
589 if (inet_ntop(AF_INET6,
590 &addr6, avalue6,
591 INET6_ADDRSTRLEN) == NULL)
592 err(1, "inet_ntop");
593 add_param(j, NULL, KP_IP6_ADDR,
594 avalue6);
595 break;
596 #endif
597 }
598 freeaddrinfo(ai0);
599 }
600 }
601 }
602
603 /*
604 * IP addresses may include an interface to set that address on,
605 * a netmask/suffix for that address and options for ifconfig.
606 * These are copied to an internal command parameter and then stripped
607 * so they won't be passed on to jailparam_set.
608 */
609 defif = string_param(j->intparams[IP_INTERFACE]) != NULL;
610 #ifdef INET
611 if (j->intparams[KP_IP4_ADDR] != NULL) {
612 TAILQ_FOREACH(s, &j->intparams[KP_IP4_ADDR]->val, tq) {
613 cs = strchr(s->s, '|');
614 if (cs || defif)
615 add_param(j, NULL, IP__IP4_IFADDR, s->s);
616 if (cs) {
617 s->len -= cs + 1 - s->s;
618 memmove(s->s, cs + 1, s->len + 1);
619 }
620 if ((cs = strchr(s->s, '/')) != NULL) {
621 *cs = '\0';
622 s->len = cs - s->s;
623 }
624 if ((cs = strchr(s->s, ' ')) != NULL) {
625 *cs = '\0';
626 s->len = cs - s->s;
627 }
628 }
629 }
630 #endif
631 #ifdef INET6
632 if (j->intparams[KP_IP6_ADDR] != NULL) {
633 TAILQ_FOREACH(s, &j->intparams[KP_IP6_ADDR]->val, tq) {
634 cs = strchr(s->s, '|');
635 if (cs || defif)
636 add_param(j, NULL, IP__IP6_IFADDR, s->s);
637 if (cs) {
638 s->len -= cs + 1 - s->s;
639 memmove(s->s, cs + 1, s->len + 1);
640 }
641 if ((cs = strchr(s->s, '/')) != NULL) {
642 *cs = '\0';
643 s->len = cs - s->s;
644 }
645 if ((cs = strchr(s->s, ' ')) != NULL) {
646 *cs = '\0';
647 s->len = cs - s->s;
648 }
649 }
650 }
651 #endif
652 #endif
653
654 /*
655 * Read mount.fstab file(s), and treat each line as its own mount
656 * parameter.
657 */
658 if (j->intparams[IP_MOUNT_FSTAB] != NULL) {
659 TAILQ_FOREACH(s, &j->intparams[IP_MOUNT_FSTAB]->val, tq) {
660 if (s->len == 0)
661 continue;
662 f = fopen(s->s, "r");
663 if (f == NULL) {
664 jail_warnx(j, "mount.fstab: %s: %s",
665 s->s, strerror(errno));
666 error = -1;
667 continue;
668 }
669 while ((ln = fgetln(f, &lnlen))) {
670 if ((cs = memchr(ln, '#', lnlen - 1)))
671 lnlen = cs - ln + 1;
672 if (ln[lnlen - 1] == '\n' ||
673 ln[lnlen - 1] == '#')
674 ln[lnlen - 1] = '\0';
675 else {
676 cs = alloca(lnlen + 1);
677 strlcpy(cs, ln, lnlen + 1);
678 ln = cs;
679 }
680 add_param(j, NULL, IP__MOUNT_FROM_FSTAB, ln);
681 }
682 fclose(f);
683 }
684 }
685 if (error)
686 failed(j);
687 return error;
688 }
689
690 /*
691 * Import parameters into libjail's binary jailparam format.
692 */
693 int
import_params(struct cfjail * j)694 import_params(struct cfjail *j)
695 {
696 struct cfparam *p;
697 struct cfstring *s, *ts;
698 struct jailparam *jp;
699 char *value, *cs;
700 size_t vallen;
701 int error;
702
703 error = 0;
704 j->njp = 0;
705 TAILQ_FOREACH(p, &j->params, tq)
706 if (!(p->flags & PF_INTERNAL))
707 j->njp++;
708 j->jp = jp = emalloc(j->njp * sizeof(struct jailparam));
709 TAILQ_FOREACH(p, &j->params, tq) {
710 if (p->flags & PF_INTERNAL)
711 continue;
712 if (jailparam_init(jp, p->name) < 0) {
713 error = -1;
714 jail_warnx(j, "%s", jail_errmsg);
715 jp++;
716 continue;
717 }
718 if (TAILQ_EMPTY(&p->val))
719 value = NULL;
720 else if (!jp->jp_elemlen ||
721 !TAILQ_NEXT(TAILQ_FIRST(&p->val), tq)) {
722 /*
723 * Scalar parameters silently discard multiple (array)
724 * values, keeping only the last value added. This
725 * lets values added from the command line append to
726 * arrays wthout pre-checking the type.
727 */
728 value = TAILQ_LAST(&p->val, cfstrings)->s;
729 } else {
730 /*
731 * Convert arrays into comma-separated strings, which
732 * jailparam_import will then convert back into arrays.
733 */
734 vallen = 0;
735 TAILQ_FOREACH(s, &p->val, tq)
736 vallen += s->len + 1;
737 value = alloca(vallen);
738 cs = value;
739 TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) {
740 memcpy(cs, s->s, s->len);
741 cs += s->len + 1;
742 cs[-1] = ',';
743 }
744 value[vallen - 1] = '\0';
745 }
746 if (jailparam_import(jp, value) < 0) {
747 error = -1;
748 jail_warnx(j, "%s", jail_errmsg);
749 }
750 jp++;
751 }
752 if (error) {
753 jailparam_free(j->jp, j->njp);
754 free(j->jp);
755 j->jp = NULL;
756 failed(j);
757 }
758 return error;
759 }
760
761 /*
762 * Check if options are equal (with or without the "no" prefix).
763 */
764 int
equalopts(const char * opt1,const char * opt2)765 equalopts(const char *opt1, const char *opt2)
766 {
767 char *p;
768
769 /* "opt" vs. "opt" or "noopt" vs. "noopt" */
770 if (strcmp(opt1, opt2) == 0)
771 return (1);
772 /* "noopt" vs. "opt" */
773 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0)
774 return (1);
775 /* "opt" vs. "noopt" */
776 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0)
777 return (1);
778 while ((p = strchr(opt1, '.')) != NULL &&
779 !strncmp(opt1, opt2, ++p - opt1)) {
780 opt2 += p - opt1;
781 opt1 = p;
782 /* "foo.noopt" vs. "foo.opt" */
783 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0)
784 return (1);
785 /* "foo.opt" vs. "foo.noopt" */
786 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0)
787 return (1);
788 }
789 return (0);
790 }
791
792 /*
793 * See if a jail name matches a wildcard.
794 */
795 int
wild_jail_match(const char * jname,const char * wname)796 wild_jail_match(const char *jname, const char *wname)
797 {
798 const char *jc, *jd, *wc, *wd;
799
800 /*
801 * A non-final "*" component in the wild name matches a single jail
802 * component, and a final "*" matches one or more jail components.
803 */
804 for (jc = jname, wc = wname;
805 (jd = strchr(jc, '.')) && (wd = strchr(wc, '.'));
806 jc = jd + 1, wc = wd + 1)
807 if (strncmp(jc, wc, jd - jc + 1) && strncmp(wc, "*.", 2))
808 return 0;
809 return (!strcmp(jc, wc) || !strcmp(wc, "*"));
810 }
811
812 /*
813 * Return if a jail name is a wildcard.
814 */
815 int
wild_jail_name(const char * wname)816 wild_jail_name(const char *wname)
817 {
818 const char *wc;
819
820 for (wc = strchr(wname, '*'); wc; wc = strchr(wc + 1, '*'))
821 if ((wc == wname || wc[-1] == '.') &&
822 (wc[1] == '\0' || wc[1] == '.'))
823 return 1;
824 return 0;
825 }
826
827 /*
828 * Free a parameter record and all its strings and variables.
829 */
830 static void
free_param(struct cfparams * pp,struct cfparam * p)831 free_param(struct cfparams *pp, struct cfparam *p)
832 {
833 free(p->name);
834 free_param_strings(p);
835 TAILQ_REMOVE(pp, p, tq);
836 free(p);
837 }
838
839 static void
free_param_strings(struct cfparam * p)840 free_param_strings(struct cfparam *p)
841 {
842 struct cfstring *s;
843 struct cfvar *v;
844
845 while ((s = TAILQ_FIRST(&p->val))) {
846 free(s->s);
847 while ((v = STAILQ_FIRST(&s->vars))) {
848 free(v->name);
849 STAILQ_REMOVE_HEAD(&s->vars, tq);
850 free(v);
851 }
852 TAILQ_REMOVE(&p->val, s, tq);
853 free(s);
854 }
855 }
856