1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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 #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
47 struct ipspec {
48 const char *name;
49 unsigned flags;
50 };
51
52 extern FILE *yyin;
53 extern int yynerrs;
54
55 extern int yyparse(void);
56
57 struct cfjails cfjails = TAILQ_HEAD_INITIALIZER(cfjails);
58
59 static void free_param(struct cfparams *pp, struct cfparam *p);
60 static void free_param_strings(struct cfparam *p);
61
62 static const struct ipspec intparams[] = {
63 [IP_ALLOW_DYING] = {"allow.dying", PF_INTERNAL | PF_BOOL},
64 [IP_COMMAND] = {"command", PF_INTERNAL},
65 [IP_DEPEND] = {"depend", PF_INTERNAL},
66 [IP_EXEC_CLEAN] = {"exec.clean", PF_INTERNAL | PF_BOOL},
67 [IP_EXEC_CONSOLELOG] = {"exec.consolelog", PF_INTERNAL},
68 [IP_EXEC_FIB] = {"exec.fib", PF_INTERNAL | PF_INT},
69 [IP_EXEC_JAIL_USER] = {"exec.jail_user", PF_INTERNAL},
70 [IP_EXEC_POSTSTART] = {"exec.poststart", PF_INTERNAL},
71 [IP_EXEC_POSTSTOP] = {"exec.poststop", PF_INTERNAL},
72 [IP_EXEC_PREPARE] = {"exec.prepare", PF_INTERNAL},
73 [IP_EXEC_PRESTART] = {"exec.prestart", PF_INTERNAL},
74 [IP_EXEC_PRESTOP] = {"exec.prestop", PF_INTERNAL},
75 [IP_EXEC_RELEASE] = {"exec.release", PF_INTERNAL},
76 [IP_EXEC_CREATED] = {"exec.created", PF_INTERNAL},
77 [IP_EXEC_START] = {"exec.start", PF_INTERNAL},
78 [IP_EXEC_STOP] = {"exec.stop", PF_INTERNAL},
79 [IP_EXEC_SYSTEM_JAIL_USER]= {"exec.system_jail_user",
80 PF_INTERNAL | PF_BOOL},
81 [IP_EXEC_SYSTEM_USER] = {"exec.system_user", PF_INTERNAL},
82 [IP_EXEC_TIMEOUT] = {"exec.timeout", PF_INTERNAL | PF_INT},
83 #if defined(INET) || defined(INET6)
84 [IP_INTERFACE] = {"interface", PF_INTERNAL},
85 [IP_IP_HOSTNAME] = {"ip_hostname", PF_INTERNAL | PF_BOOL},
86 #endif
87 [IP_MOUNT] = {"mount", PF_INTERNAL | PF_REV},
88 [IP_MOUNT_DEVFS] = {"mount.devfs", PF_INTERNAL | PF_BOOL},
89 [IP_MOUNT_FDESCFS] = {"mount.fdescfs", PF_INTERNAL | PF_BOOL},
90 [IP_MOUNT_PROCFS] = {"mount.procfs", PF_INTERNAL | PF_BOOL},
91 [IP_MOUNT_FSTAB] = {"mount.fstab", PF_INTERNAL},
92 [IP_STOP_TIMEOUT] = {"stop.timeout", PF_INTERNAL | PF_INT},
93 [IP_VNET_INTERFACE] = {"vnet.interface", PF_INTERNAL},
94 #ifdef INET
95 [IP__IP4_IFADDR] = {"ip4.addr", PF_INTERNAL | PF_CONV | PF_REV},
96 #endif
97 #ifdef INET6
98 [IP__IP6_IFADDR] = {"ip6.addr", PF_INTERNAL | PF_CONV | PF_REV},
99 #endif
100 [IP__MOUNT_FROM_FSTAB] = {"mount.fstab", PF_INTERNAL | PF_CONV | PF_REV},
101 [IP__OP] = {NULL, PF_CONV},
102 [KP_ALLOW_CHFLAGS] = {"allow.chflags", 0},
103 [KP_ALLOW_MOUNT] = {"allow.mount", 0},
104 [KP_ALLOW_RAW_SOCKETS] = {"allow.raw_sockets", 0},
105 [KP_ALLOW_SET_HOSTNAME]= {"allow.set_hostname", 0},
106 [KP_ALLOW_SOCKET_AF] = {"allow.socket_af", 0},
107 [KP_ALLOW_SYSVIPC] = {"allow.sysvipc", 0},
108 [KP_DEVFS_RULESET] = {"devfs_ruleset", 0},
109 [KP_HOST_HOSTNAME] = {"host.hostname", 0},
110 #ifdef INET
111 [KP_IP4_ADDR] = {"ip4.addr", 0},
112 #endif
113 #ifdef INET6
114 [KP_IP6_ADDR] = {"ip6.addr", 0},
115 #endif
116 [KP_JID] = {"jid", PF_IMMUTABLE},
117 [KP_NAME] = {"name", PF_IMMUTABLE},
118 [KP_PATH] = {"path", 0},
119 [KP_PERSIST] = {"persist", 0},
120 [KP_SECURELEVEL] = {"securelevel", 0},
121 [KP_VNET] = {"vnet", 0},
122 };
123
124 /*
125 * Parse the jail configuration file.
126 */
127 void
load_config(void)128 load_config(void)
129 {
130 struct cfjails wild;
131 struct cfparams opp;
132 struct cfjail *j, *tj, *wj;
133 struct cfparam *p, *vp, *tp;
134 struct cfstring *s, *vs, *ns;
135 struct cfvar *v, *vv;
136 char *ep;
137 int did_self, jseq, pgen;
138
139 if (!strcmp(cfname, "-")) {
140 cfname = "STDIN";
141 yyin = stdin;
142 } else {
143 yyin = fopen(cfname, "r");
144 if (!yyin)
145 err(1, "%s", cfname);
146 }
147 if (yyparse() || yynerrs)
148 exit(1);
149
150 /* Separate the wildcard jails out from the actual jails. */
151 jseq = 0;
152 TAILQ_INIT(&wild);
153 TAILQ_FOREACH_SAFE(j, &cfjails, tq, tj) {
154 j->seq = ++jseq;
155 if (wild_jail_name(j->name))
156 requeue(j, &wild);
157 }
158
159 TAILQ_FOREACH(j, &cfjails, tq) {
160 /* Set aside the jail's parameters. */
161 TAILQ_INIT(&opp);
162 TAILQ_CONCAT(&opp, &j->params, tq);
163 /*
164 * The jail name implies its "name" or "jid" parameter,
165 * though they may also be explicitly set later on.
166 */
167 add_param(j, NULL,
168 strtol(j->name, &ep, 10) && !*ep ? KP_JID : KP_NAME,
169 j->name);
170 /*
171 * Collect parameters for the jail, global parameters/variables,
172 * and any matching wildcard jails.
173 */
174 did_self = 0;
175 TAILQ_FOREACH(wj, &wild, tq) {
176 if (j->seq < wj->seq && !did_self) {
177 TAILQ_FOREACH(p, &opp, tq)
178 add_param(j, p, 0, NULL);
179 did_self = 1;
180 }
181 if (wild_jail_match(j->name, wj->name))
182 TAILQ_FOREACH(p, &wj->params, tq)
183 add_param(j, p, 0, NULL);
184 }
185 if (!did_self)
186 TAILQ_FOREACH(p, &opp, tq)
187 add_param(j, p, 0, NULL);
188
189 /* Resolve any variable substitutions. */
190 pgen = 0;
191 TAILQ_FOREACH(p, &j->params, tq) {
192 p->gen = ++pgen;
193 find_vars:
194 TAILQ_FOREACH(s, &p->val, tq) {
195 while ((v = STAILQ_FIRST(&s->vars))) {
196 TAILQ_FOREACH(vp, &j->params, tq)
197 if (!strcmp(vp->name, v->name))
198 break;
199 if (!vp || TAILQ_EMPTY(&vp->val)) {
200 jail_warnx(j,
201 "%s: variable \"%s\" not found",
202 p->name, v->name);
203 bad_var:
204 j->flags |= JF_FAILED;
205 TAILQ_FOREACH(vp, &j->params, tq)
206 if (vp->gen == pgen)
207 vp->flags |= PF_BAD;
208 goto free_var;
209 }
210 if (vp->flags & PF_BAD)
211 goto bad_var;
212 if (vp->gen == pgen) {
213 jail_warnx(j, "%s: variable loop",
214 v->name);
215 goto bad_var;
216 }
217 TAILQ_FOREACH(vs, &vp->val, tq)
218 if (!STAILQ_EMPTY(&vs->vars)) {
219 vp->gen = pgen;
220 TAILQ_REMOVE(&j->params, vp,
221 tq);
222 TAILQ_INSERT_BEFORE(p, vp, tq);
223 p = vp;
224 goto find_vars;
225 }
226 vs = TAILQ_FIRST(&vp->val);
227 if (TAILQ_NEXT(vs, tq) != NULL &&
228 (s->s[0] != '\0' ||
229 STAILQ_NEXT(v, tq))) {
230 jail_warnx(j, "%s: array cannot be "
231 "substituted inline",
232 p->name);
233 goto bad_var;
234 }
235 s->s = erealloc(s->s, s->len + vs->len + 1);
236 memmove(s->s + v->pos + vs->len,
237 s->s + v->pos,
238 s->len - v->pos + 1);
239 memcpy(s->s + v->pos, vs->s, vs->len);
240 vv = v;
241 while ((vv = STAILQ_NEXT(vv, tq)))
242 vv->pos += vs->len;
243 s->len += vs->len;
244 while ((vs = TAILQ_NEXT(vs, tq))) {
245 ns = emalloc(sizeof(struct cfstring));
246 ns->s = estrdup(vs->s);
247 ns->len = vs->len;
248 STAILQ_INIT(&ns->vars);
249 TAILQ_INSERT_AFTER(&p->val, s, ns, tq);
250 s = ns;
251 }
252 free_var:
253 free(v->name);
254 STAILQ_REMOVE_HEAD(&s->vars, tq);
255 free(v);
256 }
257 }
258 }
259
260 /* Free the jail's original parameter list and any variables. */
261 while ((p = TAILQ_FIRST(&opp)))
262 free_param(&opp, p);
263 TAILQ_FOREACH_SAFE(p, &j->params, tq, tp)
264 if (p->flags & PF_VAR)
265 free_param(&j->params, p);
266 }
267 while ((wj = TAILQ_FIRST(&wild))) {
268 free(wj->name);
269 while ((p = TAILQ_FIRST(&wj->params)))
270 free_param(&wj->params, p);
271 TAILQ_REMOVE(&wild, wj, tq);
272 }
273 }
274
275 /*
276 * Create a new jail record.
277 */
278 struct cfjail *
add_jail(void)279 add_jail(void)
280 {
281 struct cfjail *j;
282
283 j = emalloc(sizeof(struct cfjail));
284 memset(j, 0, sizeof(struct cfjail));
285 TAILQ_INIT(&j->params);
286 STAILQ_INIT(&j->dep[DEP_FROM]);
287 STAILQ_INIT(&j->dep[DEP_TO]);
288 j->queue = &cfjails;
289 TAILQ_INSERT_TAIL(&cfjails, j, tq);
290 return j;
291 }
292
293 /*
294 * Add a parameter to a jail.
295 */
296 void
add_param(struct cfjail * j,const struct cfparam * p,enum intparam ipnum,const char * value)297 add_param(struct cfjail *j, const struct cfparam *p, enum intparam ipnum,
298 const char *value)
299 {
300 struct cfstrings nss;
301 struct cfparam *dp, *np;
302 struct cfstring *s, *ns;
303 struct cfvar *v, *nv;
304 const char *name;
305 char *cs, *tname;
306 unsigned flags;
307
308 if (j == NULL) {
309 /* Create a single anonymous jail if one doesn't yet exist. */
310 j = TAILQ_LAST(&cfjails, cfjails);
311 if (j == NULL)
312 j = add_jail();
313 }
314 TAILQ_INIT(&nss);
315 if (p != NULL) {
316 name = p->name;
317 flags = p->flags;
318 /*
319 * Make a copy of the parameter's string list,
320 * which may be freed if it's overridden later.
321 */
322 TAILQ_FOREACH(s, &p->val, tq) {
323 ns = emalloc(sizeof(struct cfstring));
324 ns->s = estrdup(s->s);
325 ns->len = s->len;
326 STAILQ_INIT(&ns->vars);
327 STAILQ_FOREACH(v, &s->vars, tq) {
328 nv = emalloc(sizeof(struct cfvar));
329 nv->name = strdup(v->name);
330 nv->pos = v->pos;
331 STAILQ_INSERT_TAIL(&ns->vars, nv, tq);
332 }
333 TAILQ_INSERT_TAIL(&nss, ns, tq);
334 }
335 } else {
336 flags = PF_APPEND;
337 if (ipnum != IP__NULL) {
338 name = intparams[ipnum].name;
339 flags |= intparams[ipnum].flags;
340 } else if ((cs = strchr(value, '='))) {
341 tname = alloca(cs - value + 1);
342 strlcpy(tname, value, cs - value + 1);
343 name = tname;
344 value = cs + 1;
345 } else {
346 name = value;
347 value = NULL;
348 }
349 if (value != NULL) {
350 ns = emalloc(sizeof(struct cfstring));
351 ns->s = estrdup(value);
352 ns->len = strlen(value);
353 STAILQ_INIT(&ns->vars);
354 TAILQ_INSERT_TAIL(&nss, ns, tq);
355 }
356 }
357
358 /* See if this parameter has already been added. */
359 if (ipnum != IP__NULL)
360 dp = j->intparams[ipnum];
361 else
362 TAILQ_FOREACH(dp, &j->params, tq)
363 if (!(dp->flags & PF_CONV) && equalopts(dp->name, name))
364 break;
365 if (dp != NULL) {
366 /* Found it - append or replace. */
367 if ((flags ^ dp->flags) & PF_VAR) {
368 jail_warnx(j, "variable \"$%s\" cannot have the same "
369 "name as a parameter.", name);
370 j->flags |= JF_FAILED;
371 return;
372 }
373 if (dp->flags & PF_IMMUTABLE) {
374 jail_warnx(j, "cannot redefine parameter \"%s\".",
375 dp->name);
376 j->flags |= JF_FAILED;
377 return;
378 }
379 if (strcmp(dp->name, name)) {
380 free(dp->name);
381 dp->name = estrdup(name);
382 }
383 if (!(flags & PF_APPEND) || TAILQ_EMPTY(&nss))
384 free_param_strings(dp);
385 TAILQ_CONCAT(&dp->val, &nss, tq);
386 dp->flags |= flags;
387 } else {
388 /* Not found - add it. */
389 np = emalloc(sizeof(struct cfparam));
390 np->name = estrdup(name);
391 TAILQ_INIT(&np->val);
392 TAILQ_CONCAT(&np->val, &nss, tq);
393 np->flags = flags;
394 np->gen = 0;
395 TAILQ_INSERT_TAIL(&j->params, np, tq);
396 if (ipnum != IP__NULL)
397 j->intparams[ipnum] = np;
398 else
399 for (ipnum = IP__NULL + 1; ipnum < IP_NPARAM; ipnum++)
400 if (!(intparams[ipnum].flags & PF_CONV) &&
401 equalopts(name, intparams[ipnum].name)) {
402 if (flags & PF_VAR) {
403 jail_warnx(j,
404 "variable \"$%s\" "
405 "cannot have the same "
406 "name as a parameter.",
407 name);
408 j->flags |= JF_FAILED;
409 return;
410 }
411 j->intparams[ipnum] = np;
412 np->flags |= intparams[ipnum].flags;
413 break;
414 }
415 }
416 }
417
418 /*
419 * Return if a boolean parameter exists and is true.
420 */
421 int
bool_param(const struct cfparam * p)422 bool_param(const struct cfparam *p)
423 {
424 const char *cs;
425
426 if (p == NULL)
427 return 0;
428 cs = strrchr(p->name, '.');
429 return !strncmp(cs ? cs + 1 : p->name, "no", 2) ^
430 (TAILQ_EMPTY(&p->val) ||
431 !strcasecmp(TAILQ_LAST(&p->val, cfstrings)->s, "true") ||
432 (strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10)));
433 }
434
435 /*
436 * Set an integer if a parameter if it exists.
437 */
438 int
int_param(const struct cfparam * p,int * ip)439 int_param(const struct cfparam *p, int *ip)
440 {
441 if (p == NULL || TAILQ_EMPTY(&p->val))
442 return 0;
443 *ip = strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10);
444 return 1;
445 }
446
447 /*
448 * Return the string value of a scalar parameter if it exists.
449 */
450 const char *
string_param(const struct cfparam * p)451 string_param(const struct cfparam *p)
452 {
453 return (p && !TAILQ_EMPTY(&p->val)
454 ? TAILQ_LAST(&p->val, cfstrings)->s : NULL);
455 }
456
457 /*
458 * Check syntax and values of internal parameters. Set some internal
459 * parameters based on the values of others.
460 */
461 int
check_intparams(struct cfjail * j)462 check_intparams(struct cfjail *j)
463 {
464 struct cfparam *p;
465 struct cfstring *s;
466 FILE *f;
467 const char *val;
468 char *cs, *ep, *ln;
469 size_t lnlen;
470 int error;
471 #if defined(INET) || defined(INET6)
472 struct addrinfo hints;
473 struct addrinfo *ai0, *ai;
474 const char *hostname;
475 int gicode, defif;
476 #endif
477 #ifdef INET
478 struct in_addr addr4;
479 int ip4ok;
480 char avalue4[INET_ADDRSTRLEN];
481 #endif
482 #ifdef INET6
483 struct in6_addr addr6;
484 int ip6ok;
485 char avalue6[INET6_ADDRSTRLEN];
486 #endif
487
488 error = 0;
489 /* Check format of boolan and integer values. */
490 TAILQ_FOREACH(p, &j->params, tq) {
491 if (!TAILQ_EMPTY(&p->val) && (p->flags & (PF_BOOL | PF_INT))) {
492 val = TAILQ_LAST(&p->val, cfstrings)->s;
493 if (p->flags & PF_BOOL) {
494 if (strcasecmp(val, "false") &&
495 strcasecmp(val, "true") &&
496 ((void)strtol(val, &ep, 10), *ep)) {
497 jail_warnx(j,
498 "%s: unknown boolean value \"%s\"",
499 p->name, val);
500 error = -1;
501 }
502 } else {
503 (void)strtol(val, &ep, 10);
504 if (ep == val || *ep) {
505 jail_warnx(j,
506 "%s: non-integer value \"%s\"",
507 p->name, val);
508 error = -1;
509 }
510 }
511 }
512 }
513
514 #if defined(INET) || defined(INET6)
515 /*
516 * The ip_hostname parameter looks up the hostname, and adds parameters
517 * for any IP addresses it finds.
518 */
519 if (((j->flags & JF_OP_MASK) != JF_STOP ||
520 j->intparams[IP_INTERFACE] != NULL) &&
521 bool_param(j->intparams[IP_IP_HOSTNAME]) &&
522 (hostname = string_param(j->intparams[KP_HOST_HOSTNAME]))) {
523 j->intparams[IP_IP_HOSTNAME] = NULL;
524 /*
525 * Silently ignore unsupported address families from
526 * DNS lookups.
527 */
528 #ifdef INET
529 ip4ok = feature_present("inet");
530 #endif
531 #ifdef INET6
532 ip6ok = feature_present("inet6");
533 #endif
534 if (
535 #if defined(INET) && defined(INET6)
536 ip4ok || ip6ok
537 #elif defined(INET)
538 ip4ok
539 #elif defined(INET6)
540 ip6ok
541 #endif
542 ) {
543 /* Look up the hostname (or get the address) */
544 memset(&hints, 0, sizeof(hints));
545 hints.ai_socktype = SOCK_STREAM;
546 hints.ai_family =
547 #if defined(INET) && defined(INET6)
548 ip4ok ? (ip6ok ? PF_UNSPEC : PF_INET) : PF_INET6;
549 #elif defined(INET)
550 PF_INET;
551 #elif defined(INET6)
552 PF_INET6;
553 #endif
554 gicode = getaddrinfo(hostname, NULL, &hints, &ai0);
555 if (gicode != 0) {
556 jail_warnx(j, "host.hostname %s: %s", hostname,
557 gai_strerror(gicode));
558 error = -1;
559 } else {
560 /*
561 * Convert the addresses to ASCII so jailparam
562 * can convert them back. Errors are not
563 * expected here.
564 */
565 for (ai = ai0; ai; ai = ai->ai_next)
566 switch (ai->ai_family) {
567 #ifdef INET
568 case AF_INET:
569 memcpy(&addr4,
570 &((struct sockaddr_in *)
571 (void *)ai->ai_addr)->
572 sin_addr, sizeof(addr4));
573 if (inet_ntop(AF_INET,
574 &addr4, avalue4,
575 INET_ADDRSTRLEN) == NULL)
576 err(1, "inet_ntop");
577 add_param(j, NULL, KP_IP4_ADDR,
578 avalue4);
579 break;
580 #endif
581 #ifdef INET6
582 case AF_INET6:
583 memcpy(&addr6,
584 &((struct sockaddr_in6 *)
585 (void *)ai->ai_addr)->
586 sin6_addr, sizeof(addr6));
587 if (inet_ntop(AF_INET6,
588 &addr6, avalue6,
589 INET6_ADDRSTRLEN) == NULL)
590 err(1, "inet_ntop");
591 add_param(j, NULL, KP_IP6_ADDR,
592 avalue6);
593 break;
594 #endif
595 }
596 freeaddrinfo(ai0);
597 }
598 }
599 }
600
601 /*
602 * IP addresses may include an interface to set that address on,
603 * a netmask/suffix for that address and options for ifconfig.
604 * These are copied to an internal command parameter and then stripped
605 * so they won't be passed on to jailparam_set.
606 */
607 defif = string_param(j->intparams[IP_INTERFACE]) != NULL;
608 #ifdef INET
609 if (j->intparams[KP_IP4_ADDR] != NULL) {
610 TAILQ_FOREACH(s, &j->intparams[KP_IP4_ADDR]->val, tq) {
611 cs = strchr(s->s, '|');
612 if (cs || defif)
613 add_param(j, NULL, IP__IP4_IFADDR, s->s);
614 if (cs) {
615 s->len -= cs + 1 - s->s;
616 memmove(s->s, cs + 1, s->len + 1);
617 }
618 if ((cs = strchr(s->s, '/')) != NULL) {
619 *cs = '\0';
620 s->len = cs - s->s;
621 }
622 if ((cs = strchr(s->s, ' ')) != NULL) {
623 *cs = '\0';
624 s->len = cs - s->s;
625 }
626 }
627 }
628 #endif
629 #ifdef INET6
630 if (j->intparams[KP_IP6_ADDR] != NULL) {
631 TAILQ_FOREACH(s, &j->intparams[KP_IP6_ADDR]->val, tq) {
632 cs = strchr(s->s, '|');
633 if (cs || defif)
634 add_param(j, NULL, IP__IP6_IFADDR, s->s);
635 if (cs) {
636 s->len -= cs + 1 - s->s;
637 memmove(s->s, cs + 1, s->len + 1);
638 }
639 if ((cs = strchr(s->s, '/')) != NULL) {
640 *cs = '\0';
641 s->len = cs - s->s;
642 }
643 if ((cs = strchr(s->s, ' ')) != NULL) {
644 *cs = '\0';
645 s->len = cs - s->s;
646 }
647 }
648 }
649 #endif
650 #endif
651
652 /*
653 * Read mount.fstab file(s), and treat each line as its own mount
654 * parameter.
655 */
656 if (j->intparams[IP_MOUNT_FSTAB] != NULL) {
657 TAILQ_FOREACH(s, &j->intparams[IP_MOUNT_FSTAB]->val, tq) {
658 if (s->len == 0)
659 continue;
660 f = fopen(s->s, "r");
661 if (f == NULL) {
662 jail_warnx(j, "mount.fstab: %s: %s",
663 s->s, strerror(errno));
664 error = -1;
665 continue;
666 }
667 while ((ln = fgetln(f, &lnlen))) {
668 if ((cs = memchr(ln, '#', lnlen - 1)))
669 lnlen = cs - ln + 1;
670 if (ln[lnlen - 1] == '\n' ||
671 ln[lnlen - 1] == '#')
672 ln[lnlen - 1] = '\0';
673 else {
674 cs = alloca(lnlen + 1);
675 strlcpy(cs, ln, lnlen + 1);
676 ln = cs;
677 }
678 add_param(j, NULL, IP__MOUNT_FROM_FSTAB, ln);
679 }
680 fclose(f);
681 }
682 }
683 if (error)
684 failed(j);
685 return error;
686 }
687
688 /*
689 * Import parameters into libjail's binary jailparam format.
690 */
691 int
import_params(struct cfjail * j)692 import_params(struct cfjail *j)
693 {
694 struct cfparam *p;
695 struct cfstring *s, *ts;
696 struct jailparam *jp;
697 char *value, *cs;
698 size_t vallen;
699 int error;
700
701 error = 0;
702 j->njp = 0;
703 TAILQ_FOREACH(p, &j->params, tq)
704 if (!(p->flags & PF_INTERNAL))
705 j->njp++;
706 j->jp = jp = emalloc(j->njp * sizeof(struct jailparam));
707 TAILQ_FOREACH(p, &j->params, tq) {
708 if (p->flags & PF_INTERNAL)
709 continue;
710 if (jailparam_init(jp, p->name) < 0) {
711 error = -1;
712 jail_warnx(j, "%s", jail_errmsg);
713 jp++;
714 continue;
715 }
716 if (TAILQ_EMPTY(&p->val))
717 value = NULL;
718 else if (!jp->jp_elemlen ||
719 !TAILQ_NEXT(TAILQ_FIRST(&p->val), tq)) {
720 /*
721 * Scalar parameters silently discard multiple (array)
722 * values, keeping only the last value added. This
723 * lets values added from the command line append to
724 * arrays wthout pre-checking the type.
725 */
726 value = TAILQ_LAST(&p->val, cfstrings)->s;
727 } else {
728 /*
729 * Convert arrays into comma-separated strings, which
730 * jailparam_import will then convert back into arrays.
731 */
732 vallen = 0;
733 TAILQ_FOREACH(s, &p->val, tq)
734 vallen += s->len + 1;
735 value = alloca(vallen);
736 cs = value;
737 TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) {
738 memcpy(cs, s->s, s->len);
739 cs += s->len + 1;
740 cs[-1] = ',';
741 }
742 value[vallen - 1] = '\0';
743 }
744 if (jailparam_import(jp, value) < 0) {
745 error = -1;
746 jail_warnx(j, "%s", jail_errmsg);
747 }
748 jp++;
749 }
750 if (error) {
751 jailparam_free(j->jp, j->njp);
752 free(j->jp);
753 j->jp = NULL;
754 failed(j);
755 }
756 return error;
757 }
758
759 /*
760 * Check if options are equal (with or without the "no" prefix).
761 */
762 int
equalopts(const char * opt1,const char * opt2)763 equalopts(const char *opt1, const char *opt2)
764 {
765 char *p;
766
767 /* "opt" vs. "opt" or "noopt" vs. "noopt" */
768 if (strcmp(opt1, opt2) == 0)
769 return (1);
770 /* "noopt" vs. "opt" */
771 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0)
772 return (1);
773 /* "opt" vs. "noopt" */
774 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0)
775 return (1);
776 while ((p = strchr(opt1, '.')) != NULL &&
777 !strncmp(opt1, opt2, ++p - opt1)) {
778 opt2 += p - opt1;
779 opt1 = p;
780 /* "foo.noopt" vs. "foo.opt" */
781 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0)
782 return (1);
783 /* "foo.opt" vs. "foo.noopt" */
784 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0)
785 return (1);
786 }
787 return (0);
788 }
789
790 /*
791 * See if a jail name matches a wildcard.
792 */
793 int
wild_jail_match(const char * jname,const char * wname)794 wild_jail_match(const char *jname, const char *wname)
795 {
796 const char *jc, *jd, *wc, *wd;
797
798 /*
799 * A non-final "*" component in the wild name matches a single jail
800 * component, and a final "*" matches one or more jail components.
801 */
802 for (jc = jname, wc = wname;
803 (jd = strchr(jc, '.')) && (wd = strchr(wc, '.'));
804 jc = jd + 1, wc = wd + 1)
805 if (strncmp(jc, wc, jd - jc + 1) && strncmp(wc, "*.", 2))
806 return 0;
807 return (!strcmp(jc, wc) || !strcmp(wc, "*"));
808 }
809
810 /*
811 * Return if a jail name is a wildcard.
812 */
813 int
wild_jail_name(const char * wname)814 wild_jail_name(const char *wname)
815 {
816 const char *wc;
817
818 for (wc = strchr(wname, '*'); wc; wc = strchr(wc + 1, '*'))
819 if ((wc == wname || wc[-1] == '.') &&
820 (wc[1] == '\0' || wc[1] == '.'))
821 return 1;
822 return 0;
823 }
824
825 /*
826 * Free a parameter record and all its strings and variables.
827 */
828 static void
free_param(struct cfparams * pp,struct cfparam * p)829 free_param(struct cfparams *pp, struct cfparam *p)
830 {
831 free(p->name);
832 free_param_strings(p);
833 TAILQ_REMOVE(pp, p, tq);
834 free(p);
835 }
836
837 static void
free_param_strings(struct cfparam * p)838 free_param_strings(struct cfparam *p)
839 {
840 struct cfstring *s;
841 struct cfvar *v;
842
843 while ((s = TAILQ_FIRST(&p->val))) {
844 free(s->s);
845 while ((v = STAILQ_FIRST(&s->vars))) {
846 free(v->name);
847 STAILQ_REMOVE_HEAD(&s->vars, tq);
848 free(v);
849 }
850 TAILQ_REMOVE(&p->val, s, tq);
851 free(s);
852 }
853 }
854