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installworld: When installing libraries, install libc first
[dragonfly.git] / sbin / mountd / mountd.c
blobc6f1f880f62db30c217328d86f1073f3b76f66ea
1 /*
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Herb Hasler and Rick Macklem at The University of Guelph.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved.
33 * @(#)mountd.c 8.15 (Berkeley) 5/1/95
34 * $FreeBSD: head/usr.sbin/mountd/mountd.c 173056 2007-10-27 12:24:47Z simon $
35 */
36
37 #include <sys/param.h>
38 #include <sys/module.h>
39 #include <sys/mount.h>
40 #include <sys/mountctl.h>
41 #include <sys/fcntl.h>
42 #include <sys/linker.h>
43 #include <sys/stat.h>
44 #include <sys/syslog.h>
45 #include <sys/sysctl.h>
46
47 #include <rpc/rpc.h>
48 #include <rpc/rpc_com.h>
49 #include <rpcsvc/mount.h>
50 #include <vfs/nfs/rpcv2.h>
51 #include <vfs/nfs/nfsproto.h>
52 #include <vfs/nfs/nfs.h>
53 #include <vfs/ufs/ufsmount.h>
54 #include <vfs/msdosfs/msdosfsmount.h>
55 #include <vfs/ntfs/ntfsmount.h>
56 #include <vfs/isofs/cd9660/cd9660_mount.h> /* XXX need isofs in include */
57
58 #include <arpa/inet.h>
59
60 #include <ctype.h>
61 #include <err.h>
62 #include <errno.h>
63 #include <grp.h>
64 #include <limits.h>
65 #include <libutil.h>
66 #include <netdb.h>
67 #include <pwd.h>
68 #include <signal.h>
69 #include <stdio.h>
70 #include <stdlib.h>
71 #include <string.h>
72 #include <unistd.h>
73 #include "pathnames.h"
74
75 #ifdef DEBUG
76 #include <stdarg.h>
77 #endif
78
79 /*
80 * Structures for keeping the mount list and export list
81 */
82 struct mountlist {
83 struct mountlist *ml_next;
84 char ml_host[RPCMNT_NAMELEN+1];
85 char ml_dirp[RPCMNT_PATHLEN+1];
86 };
87
88 struct dirlist {
89 struct dirlist *dp_left;
90 struct dirlist *dp_right;
91 int dp_flag;
92 struct hostlist *dp_hosts; /* List of hosts this dir exported to */
93 char dp_dirp[1]; /* Actually malloc'd to size of dir */
94 };
95 /* dp_flag bits */
96 #define DP_DEFSET 0x1
97 #define DP_HOSTSET 0x2
98
99 struct exportlist {
100 struct exportlist *ex_next;
101 struct dirlist *ex_dirl;
102 struct dirlist *ex_defdir;
103 int ex_flag;
104 fsid_t ex_fs;
105 char *ex_fsdir;
106 char *ex_indexfile;
107 };
108 /* ex_flag bits */
109 #define EX_LINKED 0x1
110
111 struct netmsk {
112 struct sockaddr_storage nt_net;
113 struct sockaddr_storage nt_mask;
114 char *nt_name;
115 };
116
117 union grouptypes {
118 struct addrinfo *gt_addrinfo;
119 struct netmsk gt_net;
120 };
121
122 struct grouplist {
123 int gr_type;
124 union grouptypes gr_ptr;
125 struct grouplist *gr_next;
126 };
127 /* Group types */
128 #define GT_NULL 0x0
129 #define GT_HOST 0x1
130 #define GT_NET 0x2
131 #define GT_DEFAULT 0x3
132 #define GT_IGNORE 0x5
133
134 struct hostlist {
135 int ht_flag; /* Uses DP_xx bits */
136 struct grouplist *ht_grp;
137 struct hostlist *ht_next;
138 };
139
140 struct fhreturn {
141 int fhr_flag;
142 int fhr_vers;
143 nfsfh_t fhr_fh;
144 };
145
146 /* Global defs */
147 char *add_expdir(struct dirlist **, char *, int);
148 void add_dlist(struct dirlist **, struct dirlist *,
149 struct grouplist *, int);
150 void add_mlist(char *, char *);
151 int check_dirpath(char *);
152 int check_options(struct dirlist *);
153 int checkmask(struct sockaddr *sa);
154 int chk_host(struct dirlist *, struct sockaddr *, int *, int *);
155 void create_service(struct netconfig *nconf);
156 void del_mlist(char *, char *);
157 struct dirlist *dirp_search(struct dirlist *, char *);
158 int do_mount(struct exportlist *, struct grouplist *, int,
159 struct ucred *, char *, int, struct statfs *);
160 int do_opt(char **, char **, struct exportlist *, struct grouplist *,
161 int *, int *, struct ucred *);
162 struct exportlist *ex_search(fsid_t *);
163 struct exportlist *get_exp(void);
164 void free_dir(struct dirlist *);
165 void free_exp(struct exportlist *);
166 void free_grp(struct grouplist *);
167 void free_host(struct hostlist *);
168 void get_exportlist(void);
169 int get_host(char *, struct grouplist *, struct grouplist *);
170 struct hostlist *get_ht(void);
171 int get_line(void);
172 void get_mountlist(void);
173 int get_net(char *, struct netmsk *, int);
174 void getexp_err(struct exportlist *, struct grouplist *);
175 struct grouplist *get_grp(void);
176 void hang_dirp(struct dirlist *, struct grouplist *,
177 struct exportlist *, int);
178 void huphandler(int sig);
179 int makemask(struct sockaddr_storage *ssp, int bitlen);
180 void mntsrv(struct svc_req *, SVCXPRT *);
181 void nextfield(char **, char **);
182 void out_of_mem(void);
183 void parsecred(char *, struct ucred *);
184 int put_exlist(struct dirlist *, XDR *, struct dirlist *, int *, int);
185 void *sa_rawaddr(struct sockaddr *sa, int *nbytes);
186 int sacmp(struct sockaddr *sa1, struct sockaddr *sa2,
187 struct sockaddr *samask);
188 int scan_tree(struct dirlist *, struct sockaddr *);
189 static void usage(void);
190 int xdr_dir(XDR *, char *);
191 int xdr_explist(XDR *, caddr_t);
192 int xdr_explist_brief(XDR *, caddr_t);
193 int xdr_fhs(XDR *, caddr_t);
194 int xdr_mlist(XDR *, caddr_t);
195 void terminate(int);
196
197 struct exportlist *exphead;
198 struct mountlist *mlhead;
199 struct grouplist *grphead;
200 char *exnames_default[2] = { _PATH_EXPORTS, NULL };
201 char **exnames;
202 char **hosts = NULL;
203 struct ucred def_anon = {
204 1,
205 (uid_t) -2,
206 1,
207 { (gid_t) -2 }
208 };
209 int force_v2 = 0;
210 int resvport_only = 1;
211 int nhosts = 0;
212 int dir_only = 1;
213 int dolog = 0;
214 int got_sighup = 0;
215
216 int xcreated = 0;
217 char *svcport_str = NULL;
218 int opt_flags;
219 static int have_v6 = 1;
220
221 struct pidfh *pfh = NULL;
222 /* Bits for the opt_flags above */
223 #define OP_MAPROOT 0x01
224 #define OP_MAPALL 0x02
225 /* 0x4 free */
226 #define OP_MASK 0x08
227 #define OP_NET 0x10
228 #define OP_ALLDIRS 0x40
229 #define OP_HAVEMASK 0x80 /* A mask was specified or inferred. */
230 #define OP_QUIET 0x100
231 #define OP_MASKLEN 0x200
232
233 #ifdef DEBUG
234 int debug = 1;
235 void SYSLOG(int, const char *, ...);
236 #define syslog SYSLOG
237 #else
238 int debug = 0;
239 #endif
240
241 /*
242 * Mountd server for NFS mount protocol as described in:
243 * NFS: Network File System Protocol Specification, RFC1094, Appendix A
244 * The optional arguments are the exports file name
245 * default: _PATH_EXPORTS
246 * and "-n" to allow nonroot mount.
247 */
248 int
249 main(int argc, char **argv)
250 {
251 fd_set readfds;
252 struct netconfig *nconf;
253 char *endptr, **hosts_bak;
254 void *nc_handle;
255 pid_t otherpid;
256 in_port_t svcport;
257 int c, k, s;
258 int maxrec = RPC_MAXDATASIZE;
259
260 /* Check that another mountd isn't already running. */
261 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &otherpid);
262 if (pfh == NULL) {
263 if (errno == EEXIST)
264 errx(1, "mountd already running, pid: %d.", otherpid);
265 warn("cannot open or create pidfile");
266 }
267
268 s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
269 if (s < 0)
270 have_v6 = 0;
271 else
272 close(s);
273 if (modfind("nfs") < 0) {
274 /* Not present in kernel, try loading it */
275 if (kldload("nfs") < 0 || modfind("nfs") < 0)
276 errx(1, "NFS server is not available or loadable");
277 }
278
279 while ((c = getopt(argc, argv, "2dh:lnp:r")) != -1) {
280 switch (c) {
281 case '2':
282 force_v2 = 1;
283 break;
284 case 'n':
285 resvport_only = 0;
286 break;
287 case 'r':
288 dir_only = 0;
289 break;
290 case 'd':
291 debug = debug ? 0 : 1;
292 break;
293 case 'l':
294 dolog = 1;
295 break;
296 case 'p':
297 endptr = NULL;
298 svcport = (in_port_t)strtoul(optarg, &endptr, 10);
299 if (endptr == NULL || *endptr != '\0' ||
300 svcport == 0 || svcport >= IPPORT_MAX)
301 usage();
302 svcport_str = strdup(optarg);
303 break;
304 case 'h':
305 ++nhosts;
306 hosts_bak = hosts;
307 hosts_bak = realloc(hosts, nhosts * sizeof(char *));
308 if (hosts_bak == NULL) {
309 if (hosts != NULL) {
310 for (k = 0; k < nhosts; k++)
311 free(hosts[k]);
312 free(hosts);
313 out_of_mem();
314 }
315 }
316 hosts = hosts_bak;
317 hosts[nhosts - 1] = strdup(optarg);
318 if (hosts[nhosts - 1] == NULL) {
319 for (k = 0; k < (nhosts - 1); k++)
320 free(hosts[k]);
321 free(hosts);
322 out_of_mem();
323 }
324 break;
325 default:
326 usage();
327 }
328 }
329 if (debug == 0) {
330 daemon(0, 0);
331 signal(SIGINT, SIG_IGN);
332 signal(SIGQUIT, SIG_IGN);
333 }
334 argc -= optind;
335 argv += optind;
336 grphead = NULL;
337 exphead = NULL;
338 mlhead = NULL;
339 if (argc > 0)
340 exnames = argv;
341 else
342 exnames = exnames_default;
343 openlog("mountd", LOG_PID, LOG_DAEMON);
344 if (debug)
345 warnx("getting export list");
346 get_exportlist();
347 if (debug)
348 warnx("getting mount list");
349 get_mountlist();
350 if (debug)
351 warnx("here we go");
352 signal(SIGHUP, huphandler);
353 signal(SIGTERM, terminate);
354 signal(SIGPIPE, SIG_IGN);
355
356 pidfile_write(pfh);
357
358 rpcb_unset(RPCPROG_MNT, RPCMNT_VER1, NULL);
359 rpcb_unset(RPCPROG_MNT, RPCMNT_VER3, NULL);
360
361 rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
362
363 if (!resvport_only) {
364 if (sysctlbyname("vfs.nfs.nfs_privport", NULL, NULL,
365 &resvport_only, sizeof(resvport_only)) != 0 &&
366 errno != ENOENT) {
367 syslog(LOG_ERR, "sysctl: %m");
368 exit(1);
369 }
370 }
371
372 /*
373 * If no hosts were specified, add a wildcard entry to bind to
374 * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the
375 * list.
376 */
377 if (nhosts == 0) {
378 hosts = malloc(sizeof(char**));
379 if (hosts == NULL)
380 out_of_mem();
381 hosts[0] = "*";
382 nhosts = 1;
383 } else {
384 hosts_bak = hosts;
385 if (have_v6) {
386 hosts_bak = realloc(hosts, (nhosts + 2) *
387 sizeof(char *));
388 if (hosts_bak == NULL) {
389 for (k = 0; k < nhosts; k++)
390 free(hosts[k]);
391 free(hosts);
392 out_of_mem();
393 } else
394 hosts = hosts_bak;
395 nhosts += 2;
396 hosts[nhosts - 2] = "::1";
397 } else {
398 hosts_bak = realloc(hosts, (nhosts + 1) * sizeof(char *));
399 if (hosts_bak == NULL) {
400 for (k = 0; k < nhosts; k++)
401 free(hosts[k]);
402 free(hosts);
403 out_of_mem();
404 } else {
405 nhosts += 1;
406 hosts = hosts_bak;
407 }
408 }
409 hosts[nhosts - 1] = "127.0.0.1";
410 }
411
412 nc_handle = setnetconfig();
413 while ((nconf = getnetconfig(nc_handle))) {
414 if (nconf->nc_flag & NC_VISIBLE) {
415 if (have_v6 == 0 && strcmp(nconf->nc_protofmly,
416 "inet6") == 0) {
417 /* DO NOTHING */
418 } else
419 create_service(nconf);
420 }
421 }
422 endnetconfig(nc_handle);
423
424 if (xcreated == 0) {
425 syslog(LOG_ERR, "could not create any services");
426 exit(1);
427 }
428
429 /* Expand svc_run() here so that we can call get_exportlist(). */
430 for (;;) {
431 if (got_sighup) {
432 get_exportlist();
433 got_sighup = 0;
434 }
435 readfds = svc_fdset;
436 switch (select(svc_maxfd + 1, &readfds, NULL, NULL, NULL)) {
437 case -1:
438 if (errno == EINTR)
439 continue;
440 syslog(LOG_ERR, "mountd died: select: %m");
441 exit(1);
442 case 0:
443 continue;
444 default:
445 svc_getreqset(&readfds);
446 }
447 }
448 }
449
450 /*
451 * This routine creates and binds sockets on the appropriate
452 * addresses. It gets called one time for each transport and
453 * registrates the service with rpcbind on that trasport.
454 */
455 void
456 create_service(struct netconfig *nconf)
457 {
458 struct addrinfo hints, *res = NULL;
459 struct sockaddr_in *sin;
460 struct sockaddr_in6 *sin6;
461 struct __rpc_sockinfo si;
462 struct netbuf servaddr;
463 SVCXPRT *transp = NULL;
464 int aicode;
465 int fd;
466 int nhostsbak;
467 int one = 1;
468 int r;
469 int registered = 0;
470 u_int32_t host_addr[4]; /* IPv4 or IPv6 */
471
472 if ((nconf->nc_semantics != NC_TPI_CLTS) &&
473 (nconf->nc_semantics != NC_TPI_COTS) &&
474 (nconf->nc_semantics != NC_TPI_COTS_ORD))
475 return; /* not my type */
476
477 /*
478 * XXX - using RPC library internal functions.
479 */
480 if (!__rpc_nconf2sockinfo(nconf, &si)) {
481 syslog(LOG_ERR, "cannot get information for %s",
482 nconf->nc_netid);
483 return;
484 }
485
486 /* Get mountd's address on this transport */
487 memset(&hints, 0, sizeof hints);
488 hints.ai_flags = AI_PASSIVE;
489 hints.ai_family = si.si_af;
490 hints.ai_socktype = si.si_socktype;
491 hints.ai_protocol = si.si_proto;
492
493 /*
494 * Bind to specific IPs if asked to
495 */
496 nhostsbak = nhosts;
497 while (nhostsbak > 0) {
498 --nhostsbak;
499 /*
500 * XXX - using RPC library internal functions.
501 */
502 if ((fd = __rpc_nconf2fd(nconf)) < 0) {
503 int non_fatal = 0;
504 if (errno == EPROTONOSUPPORT &&
505 nconf->nc_semantics != NC_TPI_CLTS)
506 non_fatal = 1;
507
508 syslog(non_fatal ? LOG_DEBUG : LOG_ERR,
509 "cannot create socket for %s", nconf->nc_netid);
510 return;
511 }
512
513 switch (hints.ai_family) {
514 case AF_INET:
515 if (inet_pton(AF_INET, hosts[nhostsbak],
516 host_addr) == 1) {
517 hints.ai_flags &= AI_NUMERICHOST;
518 } else {
519 /*
520 * Skip if we have an AF_INET6 address.
521 */
522 if (inet_pton(AF_INET6, hosts[nhostsbak],
523 host_addr) == 1) {
524 close(fd);
525 continue;
526 }
527 }
528 break;
529 case AF_INET6:
530 if (inet_pton(AF_INET6, hosts[nhostsbak],
531 host_addr) == 1) {
532 hints.ai_flags &= AI_NUMERICHOST;
533 } else {
534 /*
535 * Skip if we have an AF_INET address.
536 */
537 if (inet_pton(AF_INET, hosts[nhostsbak],
538 host_addr) == 1) {
539 close(fd);
540 continue;
541 }
542 }
543
544 /*
545 * We're doing host-based access checks here, so don't
546 * allow v4-in-v6 to confuse things. The kernel will
547 * disable it by default on NFS sockets too.
548 */
549 if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one,
550 sizeof one) < 0) {
551 syslog(LOG_ERR,
552 "can't disable v4-in-v6 on IPv6 socket");
553 exit(1);
554 }
555 break;
556 default:
557 break;
558 }
559
560 /*
561 * If no hosts were specified, just bind to INADDR_ANY
562 */
563 if (strcmp("*", hosts[nhostsbak]) == 0) {
564 if (svcport_str == NULL) {
565 res = malloc(sizeof(struct addrinfo));
566 if (res == NULL)
567 out_of_mem();
568 res->ai_flags = hints.ai_flags;
569 res->ai_family = hints.ai_family;
570 res->ai_protocol = hints.ai_protocol;
571 switch (res->ai_family) {
572 case AF_INET:
573 sin = malloc(sizeof(struct sockaddr_in));
574 if (sin == NULL)
575 out_of_mem();
576 sin->sin_family = AF_INET;
577 sin->sin_port = htons(0);
578 sin->sin_addr.s_addr = htonl(INADDR_ANY);
579 res->ai_addr = (struct sockaddr*) sin;
580 res->ai_addrlen = (socklen_t)
581 sizeof(res->ai_addr);
582 break;
583 case AF_INET6:
584 sin6 = malloc(sizeof(struct sockaddr_in6));
585 if (sin6 == NULL)
586 out_of_mem();
587 sin6->sin6_family = AF_INET6;
588 sin6->sin6_port = htons(0);
589 sin6->sin6_addr = in6addr_any;
590 res->ai_addr = (struct sockaddr*) sin6;
591 res->ai_addrlen = (socklen_t)
592 sizeof(res->ai_addr);
593 break;
594 default:
595 break;
596 }
597 } else {
598 if ((aicode = getaddrinfo(NULL, svcport_str,
599 &hints, &res)) != 0) {
600 syslog(LOG_ERR,
601 "cannot get local address for %s: %s",
602 nconf->nc_netid,
603 gai_strerror(aicode));
604 continue;
605 }
606 }
607 } else {
608 if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str,
609 &hints, &res)) != 0) {
610 syslog(LOG_ERR,
611 "cannot get local address for %s: %s",
612 nconf->nc_netid, gai_strerror(aicode));
613 continue;
614 }
615 }
616
617 r = bindresvport_sa(fd, res->ai_addr);
618 if (r != 0) {
619 syslog(LOG_ERR, "bindresvport_sa: %m");
620 exit(1);
621 }
622
623 if (nconf->nc_semantics != NC_TPI_CLTS)
624 listen(fd, SOMAXCONN);
625
626 if (nconf->nc_semantics == NC_TPI_CLTS )
627 transp = svc_dg_create(fd, 0, 0);
628 else
629 transp = svc_vc_create(fd, RPC_MAXDATASIZE,
630 RPC_MAXDATASIZE);
631
632 if (transp != (SVCXPRT *) NULL) {
633 if (!svc_reg(transp, RPCPROG_MNT, RPCMNT_VER1, mntsrv,
634 NULL))
635 syslog(LOG_ERR,
636 "can't register %s RPCMNT_VER1 service",
637 nconf->nc_netid);
638 if (!force_v2) {
639 if (!svc_reg(transp, RPCPROG_MNT, RPCMNT_VER3,
640 mntsrv, NULL))
641 syslog(LOG_ERR,
642 "can't register %s RPCMNT_VER3 service",
643 nconf->nc_netid);
644 }
645 } else
646 syslog(LOG_WARNING, "can't create %s services",
647 nconf->nc_netid);
648
649 if (registered == 0) {
650 registered = 1;
651 memset(&hints, 0, sizeof hints);
652 hints.ai_flags = AI_PASSIVE;
653 hints.ai_family = si.si_af;
654 hints.ai_socktype = si.si_socktype;
655 hints.ai_protocol = si.si_proto;
656
657 if (svcport_str == NULL) {
658 svcport_str = malloc(NI_MAXSERV * sizeof(char));
659 if (svcport_str == NULL)
660 out_of_mem();
661
662 if (getnameinfo(res->ai_addr,
663 res->ai_addr->sa_len, NULL, NI_MAXHOST,
664 svcport_str, NI_MAXSERV * sizeof(char),
665 NI_NUMERICHOST | NI_NUMERICSERV))
666 errx(1, "Cannot get port number");
667 }
668
669 if((aicode = getaddrinfo(NULL, svcport_str, &hints,
670 &res)) != 0) {
671 syslog(LOG_ERR, "cannot get local address: %s",
672 gai_strerror(aicode));
673 exit(1);
674 }
675
676 servaddr.buf = malloc(res->ai_addrlen);
677 memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen);
678 servaddr.len = res->ai_addrlen;
679
680 rpcb_set(RPCPROG_MNT, RPCMNT_VER1, nconf, &servaddr);
681 rpcb_set(RPCPROG_MNT, RPCMNT_VER3, nconf, &servaddr);
682
683 xcreated++;
684 freeaddrinfo(res);
685 }
686 } /* end while */
687 }
688
689 static void
690 usage(void)
691 {
692 fprintf(stderr,
693 "usage: mountd [-2] [-d] [-l] [-n] [-p <port>] [-r] "
694 "[-h <bindip>] [export_file ...]\n");
695 exit(1);
696 }
697
698 /*
699 * The mount rpc service
700 */
701 void
702 mntsrv(struct svc_req *rqstp, SVCXPRT *transp)
703 {
704 struct exportlist *ep;
705 struct dirlist *dp;
706 struct fhreturn fhr;
707 struct stat stb;
708 struct statfs fsb;
709 char host[NI_MAXHOST], numerichost[NI_MAXHOST];
710 int lookup_failed = 1;
711 struct sockaddr *saddr;
712 u_short sport;
713 char rpcpath[RPCMNT_PATHLEN + 1], dirpath[MAXPATHLEN];
714 int bad = 0, defset, hostset;
715 sigset_t sighup_mask;
716
717 sigemptyset(&sighup_mask);
718 sigaddset(&sighup_mask, SIGHUP);
719 saddr = svc_getrpccaller(transp)->buf;
720 switch (saddr->sa_family) {
721 case AF_INET6:
722 sport = ntohs(((struct sockaddr_in6 *)saddr)->sin6_port);
723 break;
724 case AF_INET:
725 sport = ntohs(((struct sockaddr_in *)saddr)->sin_port);
726 break;
727 default:
728 syslog(LOG_ERR, "request from unknown address family");
729 return;
730 }
731 lookup_failed = getnameinfo(saddr, saddr->sa_len, host, sizeof host,
732 NULL, 0, 0);
733 getnameinfo(saddr, saddr->sa_len, numerichost,
734 sizeof numerichost, NULL, 0, NI_NUMERICHOST);
735 switch (rqstp->rq_proc) {
736 case NULLPROC:
737 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL))
738 syslog(LOG_ERR, "can't send reply");
739 return;
740 case RPCMNT_MOUNT:
741 if (sport >= IPPORT_RESERVED && resvport_only) {
742 syslog(LOG_NOTICE,
743 "mount request from %s from unprivileged port",
744 numerichost);
745 svcerr_weakauth(transp);
746 return;
747 }
748 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) {
749 syslog(LOG_NOTICE, "undecodable mount request from %s",
750 numerichost);
751 svcerr_decode(transp);
752 return;
753 }
754
755 /*
756 * Get the real pathname and make sure it is a directory
757 * or a regular file if the -r option was specified
758 * and it exists.
759 */
760 if (realpath(rpcpath, dirpath) == NULL ||
761 stat(dirpath, &stb) < 0 ||
762 (!S_ISDIR(stb.st_mode) &&
763 (dir_only || !S_ISREG(stb.st_mode))) ||
764 statfs(dirpath, &fsb) < 0) {
765 chdir("/"); /* Just in case realpath doesn't */
766 syslog(LOG_NOTICE,
767 "mount request from %s for non existent path %s",
768 numerichost, dirpath);
769 if (debug)
770 warnx("stat failed on %s", dirpath);
771 bad = ENOENT; /* We will send error reply later */
772 }
773
774 /* Check in the exports list */
775 sigprocmask(SIG_BLOCK, &sighup_mask, NULL);
776 ep = ex_search(&fsb.f_fsid);
777 hostset = defset = 0;
778 if (ep && (chk_host(ep->ex_defdir, saddr, &defset, &hostset) ||
779 ((dp = dirp_search(ep->ex_dirl, dirpath)) &&
780 chk_host(dp, saddr, &defset, &hostset)) ||
781 (defset && scan_tree(ep->ex_defdir, saddr) == 0 &&
782 scan_tree(ep->ex_dirl, saddr) == 0))) {
783 if (bad) {
784 if (!svc_sendreply(transp, (xdrproc_t)xdr_long,
785 &bad))
786 syslog(LOG_ERR, "can't send reply");
787 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
788 return;
789 }
790 if (hostset & DP_HOSTSET)
791 fhr.fhr_flag = hostset;
792 else
793 fhr.fhr_flag = defset;
794 fhr.fhr_vers = rqstp->rq_vers;
795 /* Get the file handle */
796 memset(&fhr.fhr_fh, 0, sizeof(nfsfh_t));
797 if (getfh(dirpath, (fhandle_t *)&fhr.fhr_fh) < 0) {
798 bad = errno;
799 syslog(LOG_ERR, "can't get fh for %s", dirpath);
800 if (!svc_sendreply(transp, (xdrproc_t)xdr_long,
801 &bad))
802 syslog(LOG_ERR, "can't send reply");
803 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
804 return;
805 }
806 if (!svc_sendreply(transp, (xdrproc_t)xdr_fhs, &fhr))
807 syslog(LOG_ERR, "can't send reply");
808 if (!lookup_failed)
809 add_mlist(host, dirpath);
810 else
811 add_mlist(numerichost, dirpath);
812 if (debug)
813 warnx("mount successful");
814 if (dolog)
815 syslog(LOG_NOTICE,
816 "mount request succeeded from %s for %s",
817 numerichost, dirpath);
818 } else {
819 bad = EACCES;
820 syslog(LOG_NOTICE,
821 "mount request denied from %s for %s",
822 numerichost, dirpath);
823 }
824
825 if (bad && !svc_sendreply(transp, (xdrproc_t)xdr_long, &bad))
826 syslog(LOG_ERR, "can't send reply");
827 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
828 return;
829 case RPCMNT_DUMP:
830 if (!svc_sendreply(transp, (xdrproc_t)xdr_mlist, NULL))
831 syslog(LOG_ERR, "can't send reply");
832 else if (dolog)
833 syslog(LOG_NOTICE,
834 "dump request succeeded from %s",
835 numerichost);
836 return;
837 case RPCMNT_UMOUNT:
838 if (sport >= IPPORT_RESERVED && resvport_only) {
839 syslog(LOG_NOTICE,
840 "umount request from %s from unprivileged port",
841 numerichost);
842 svcerr_weakauth(transp);
843 return;
844 }
845 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) {
846 syslog(LOG_NOTICE, "undecodable umount request from %s",
847 numerichost);
848 svcerr_decode(transp);
849 return;
850 }
851 if (realpath(rpcpath, dirpath) == NULL) {
852 syslog(LOG_NOTICE, "umount request from %s "
853 "for non existent path %s",
854 numerichost, dirpath);
855 }
856 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL))
857 syslog(LOG_ERR, "can't send reply");
858 if (!lookup_failed)
859 del_mlist(host, dirpath);
860 del_mlist(numerichost, dirpath);
861 if (dolog)
862 syslog(LOG_NOTICE,
863 "umount request succeeded from %s for %s",
864 numerichost, dirpath);
865 return;
866 case RPCMNT_UMNTALL:
867 if (sport >= IPPORT_RESERVED && resvport_only) {
868 syslog(LOG_NOTICE,
869 "umountall request from %s from unprivileged port",
870 numerichost);
871 svcerr_weakauth(transp);
872 return;
873 }
874 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL))
875 syslog(LOG_ERR, "can't send reply");
876 if (!lookup_failed)
877 del_mlist(host, NULL);
878 del_mlist(numerichost, NULL);
879 if (dolog)
880 syslog(LOG_NOTICE,
881 "umountall request succeeded from %s",
882 numerichost);
883 return;
884 case RPCMNT_EXPORT:
885 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist, NULL))
886 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist_brief, NULL))
887 syslog(LOG_ERR, "can't send reply");
888 if (dolog)
889 syslog(LOG_NOTICE,
890 "export request succeeded from %s",
891 numerichost);
892 return;
893 default:
894 svcerr_noproc(transp);
895 return;
896 }
897 }
898
899 /*
900 * Xdr conversion for a dirpath string
901 */
902 int
903 xdr_dir(XDR *xdrsp, char *dirp)
904 {
905 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
906 }
907
908 /*
909 * Xdr routine to generate file handle reply
910 */
911 int
912 xdr_fhs(XDR *xdrsp, caddr_t cp)
913 {
914 struct fhreturn *fhrp = (struct fhreturn *)cp;
915 u_long ok = 0, len, auth;
916
917 if (!xdr_long(xdrsp, &ok))
918 return (0);
919 switch (fhrp->fhr_vers) {
920 case 1:
921 return (xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, NFSX_V2FH));
922 case 3:
923 len = NFSX_V3FH;
924 if (!xdr_long(xdrsp, &len))
925 return (0);
926 if (!xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, len))
927 return (0);
928 auth = RPCAUTH_UNIX;
929 len = 1;
930 if (!xdr_long(xdrsp, &len))
931 return (0);
932 return (xdr_long(xdrsp, &auth));
933 }
934 return (0);
935 }
936
937 int
938 xdr_mlist(XDR *xdrsp, caddr_t cp)
939 {
940 struct mountlist *mlp;
941 int true = 1;
942 int false = 0;
943 char *strp;
944
945 mlp = mlhead;
946 while (mlp) {
947 if (!xdr_bool(xdrsp, &true))
948 return (0);
949 strp = &mlp->ml_host[0];
950 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
951 return (0);
952 strp = &mlp->ml_dirp[0];
953 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
954 return (0);
955 mlp = mlp->ml_next;
956 }
957 if (!xdr_bool(xdrsp, &false))
958 return (0);
959 return (1);
960 }
961
962 /*
963 * Xdr conversion for export list
964 */
965 int
966 xdr_explist_common(XDR *xdrsp, caddr_t cp, int brief)
967 {
968 struct exportlist *ep;
969 int false = 0;
970 int putdef;
971 sigset_t sighup_mask;
972
973 sigemptyset(&sighup_mask);
974 sigaddset(&sighup_mask, SIGHUP);
975 sigprocmask(SIG_BLOCK, &sighup_mask, NULL);
976 ep = exphead;
977 while (ep) {
978 putdef = 0;
979 if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir,
980 &putdef, brief))
981 goto errout;
982 if (ep->ex_defdir && putdef == 0 &&
983 put_exlist(ep->ex_defdir, xdrsp, NULL,
984 &putdef, brief))
985 goto errout;
986 ep = ep->ex_next;
987 }
988 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
989 if (!xdr_bool(xdrsp, &false))
990 return (0);
991 return (1);
992 errout:
993 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
994 return (0);
995 }
996
997 /*
998 * Called from xdr_explist() to traverse the tree and export the
999 * directory paths.
1000 */
1001 int
1002 put_exlist(struct dirlist *dp, XDR *xdrsp, struct dirlist *adp, int *putdefp, int brief)
1003 {
1004 struct grouplist *grp;
1005 struct hostlist *hp;
1006 int true = 1;
1007 int false = 0;
1008 int gotalldir = 0;
1009 char *strp;
1010
1011 if (dp) {
1012 if (put_exlist(dp->dp_left, xdrsp, adp, putdefp, brief))
1013 return (1);
1014 if (!xdr_bool(xdrsp, &true))
1015 return (1);
1016 strp = dp->dp_dirp;
1017 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
1018 return (1);
1019 if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) {
1020 gotalldir = 1;
1021 *putdefp = 1;
1022 }
1023 if (brief) {
1024 if (!xdr_bool(xdrsp, &true))
1025 return (1);
1026 strp = "(...)";
1027 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
1028 return (1);
1029 } else if ((dp->dp_flag & DP_DEFSET) == 0 &&
1030 (gotalldir == 0 || (adp->dp_flag & DP_DEFSET) == 0)) {
1031 hp = dp->dp_hosts;
1032 while (hp) {
1033 grp = hp->ht_grp;
1034 if (grp->gr_type == GT_HOST) {
1035 if (!xdr_bool(xdrsp, &true))
1036 return (1);
1037 strp = grp->gr_ptr.gt_addrinfo->ai_canonname;
1038 if (!xdr_string(xdrsp, &strp,
1039 RPCMNT_NAMELEN))
1040 return (1);
1041 } else if (grp->gr_type == GT_NET) {
1042 if (!xdr_bool(xdrsp, &true))
1043 return (1);
1044 strp = grp->gr_ptr.gt_net.nt_name;
1045 if (!xdr_string(xdrsp, &strp,
1046 RPCMNT_NAMELEN))
1047 return (1);
1048 }
1049 hp = hp->ht_next;
1050 if (gotalldir && hp == NULL) {
1051 hp = adp->dp_hosts;
1052 gotalldir = 0;
1053 }
1054 }
1055 }
1056 if (!xdr_bool(xdrsp, &false))
1057 return (1);
1058 if (put_exlist(dp->dp_right, xdrsp, adp, putdefp, brief))
1059 return (1);
1060 }
1061 return (0);
1062 }
1063
1064 int
1065 xdr_explist(XDR *xdrsp, caddr_t cp)
1066 {
1067
1068 return xdr_explist_common(xdrsp, cp, 0);
1069 }
1070
1071 int
1072 xdr_explist_brief(XDR *xdrsp, caddr_t cp)
1073 {
1074
1075 return xdr_explist_common(xdrsp, cp, 1);
1076 }
1077
1078 char *line;
1079 int linesize;
1080 FILE *exp_file;
1081
1082 /*
1083 * Get the export list from one, currently open file
1084 */
1085 static void
1086 get_exportlist_one(void)
1087 {
1088 struct exportlist *ep, *ep2;
1089 struct grouplist *grp, *tgrp;
1090 struct exportlist **epp;
1091 struct dirlist *dirhead;
1092 struct statfs fsb;
1093 struct ucred anon;
1094 char *cp, *endcp, *dirp, *hst, *usr, *dom, savedc;
1095 int len, has_host, exflags, got_nondir, dirplen, netgrp;
1096
1097 dirhead = NULL;
1098 while (get_line()) {
1099 if (debug)
1100 warnx("got line %s", line);
1101 cp = line;
1102 nextfield(&cp, &endcp);
1103 if (*cp == '#')
1104 goto nextline;
1105
1106 /*
1107 * Set defaults.
1108 */
1109 has_host = FALSE;
1110 anon = def_anon;
1111 exflags = MNT_EXPORTED;
1112 got_nondir = 0;
1113 opt_flags = 0;
1114 ep = NULL;
1115
1116 /*
1117 * Create new exports list entry
1118 */
1119 len = endcp-cp;
1120 tgrp = grp = get_grp();
1121 while (len > 0) {
1122 if (len > RPCMNT_NAMELEN) {
1123 getexp_err(ep, tgrp);
1124 goto nextline;
1125 }
1126 if (*cp == '-') {
1127 if (ep == NULL) {
1128 getexp_err(ep, tgrp);
1129 goto nextline;
1130 }
1131 if (debug)
1132 warnx("doing opt %s", cp);
1133 got_nondir = 1;
1134 if (do_opt(&cp, &endcp, ep, grp, &has_host,
1135 &exflags, &anon)) {
1136 getexp_err(ep, tgrp);
1137 goto nextline;
1138 }
1139 } else if (*cp == '/') {
1140 savedc = *endcp;
1141 *endcp = '\0';
1142 if (check_dirpath(cp) &&
1143 statfs(cp, &fsb) >= 0) {
1144 if (got_nondir) {
1145 syslog(LOG_ERR, "dirs must be first");
1146 getexp_err(ep, tgrp);
1147 goto nextline;
1148 }
1149 if (ep) {
1150 if (ep->ex_fs.val[0] != fsb.f_fsid.val[0] ||
1151 ep->ex_fs.val[1] != fsb.f_fsid.val[1]) {
1152 getexp_err(ep, tgrp);
1153 goto nextline;
1154 }
1155 } else {
1156 /*
1157 * See if this directory is already
1158 * in the list.
1159 */
1160 ep = ex_search(&fsb.f_fsid);
1161 if (ep == NULL) {
1162 ep = get_exp();
1163 ep->ex_fs = fsb.f_fsid;
1164 ep->ex_fsdir = (char *)
1165 malloc(strlen(fsb.f_mntonname) + 1);
1166 if (ep->ex_fsdir)
1167 strcpy(ep->ex_fsdir,
1168 fsb.f_mntonname);
1169 else
1170 out_of_mem();
1171 if (debug)
1172 warnx("making new ep fs=0x%x,0x%x",
1173 fsb.f_fsid.val[0],
1174 fsb.f_fsid.val[1]);
1175 } else if (debug)
1176 warnx("found ep fs=0x%x,0x%x",
1177 fsb.f_fsid.val[0],
1178 fsb.f_fsid.val[1]);
1179 }
1180
1181 /*
1182 * Add dirpath to export mount point.
1183 */
1184 dirp = add_expdir(&dirhead, cp, len);
1185 dirplen = len;
1186 } else {
1187 getexp_err(ep, tgrp);
1188 goto nextline;
1189 }
1190 *endcp = savedc;
1191 } else {
1192 savedc = *endcp;
1193 *endcp = '\0';
1194 got_nondir = 1;
1195 if (ep == NULL) {
1196 getexp_err(ep, tgrp);
1197 goto nextline;
1198 }
1199
1200 /*
1201 * Get the host or netgroup.
1202 */
1203 setnetgrent(cp);
1204 netgrp = getnetgrent(&hst, &usr, &dom);
1205 do {
1206 if (has_host) {
1207 grp->gr_next = get_grp();
1208 grp = grp->gr_next;
1209 }
1210 if (netgrp) {
1211 if (hst == NULL) {
1212 syslog(LOG_ERR,
1213 "null hostname in netgroup %s, skipping", cp);
1214 grp->gr_type = GT_IGNORE;
1215 } else if (get_host(hst, grp, tgrp)) {
1216 syslog(LOG_ERR,
1217 "bad host %s in netgroup %s, skipping", hst, cp);
1218 grp->gr_type = GT_IGNORE;
1219 }
1220 } else if (get_host(cp, grp, tgrp)) {
1221 syslog(LOG_ERR, "bad host %s, skipping", cp);
1222 grp->gr_type = GT_IGNORE;
1223 }
1224 has_host = TRUE;
1225 } while (netgrp && getnetgrent(&hst, &usr, &dom));
1226 endnetgrent();
1227 *endcp = savedc;
1228 }
1229 cp = endcp;
1230 nextfield(&cp, &endcp);
1231 len = endcp - cp;
1232 }
1233 if (check_options(dirhead)) {
1234 getexp_err(ep, tgrp);
1235 goto nextline;
1236 }
1237 if (!has_host) {
1238 grp->gr_type = GT_DEFAULT;
1239 if (debug)
1240 warnx("adding a default entry");
1241
1242 /*
1243 * Don't allow a network export coincide with a list of
1244 * host(s) on the same line.
1245 */
1246 } else if ((opt_flags & OP_NET) && tgrp->gr_next) {
1247 syslog(LOG_ERR, "network/host conflict");
1248 getexp_err(ep, tgrp);
1249 goto nextline;
1250
1251 /*
1252 * If an export list was specified on this line, make sure
1253 * that we have at least one valid entry, otherwise skip it.
1254 */
1255 } else {
1256 grp = tgrp;
1257 while (grp && grp->gr_type == GT_IGNORE)
1258 grp = grp->gr_next;
1259 if (! grp) {
1260 getexp_err(ep, tgrp);
1261 goto nextline;
1262 }
1263 }
1264
1265 /*
1266 * Loop through hosts, pushing the exports into the kernel.
1267 * After loop, tgrp points to the start of the list and
1268 * grp points to the last entry in the list.
1269 */
1270 grp = tgrp;
1271 do {
1272 if (do_mount(ep, grp, exflags, &anon, dirp, dirplen,
1273 &fsb)) {
1274 getexp_err(ep, tgrp);
1275 goto nextline;
1276 }
1277 } while (grp->gr_next && (grp = grp->gr_next));
1278
1279 /*
1280 * Success. Update the data structures.
1281 */
1282 if (has_host) {
1283 hang_dirp(dirhead, tgrp, ep, opt_flags);
1284 grp->gr_next = grphead;
1285 grphead = tgrp;
1286 } else {
1287 hang_dirp(dirhead, NULL, ep,
1288 opt_flags);
1289 free_grp(grp);
1290 }
1291 dirhead = NULL;
1292 if ((ep->ex_flag & EX_LINKED) == 0) {
1293 ep2 = exphead;
1294 epp = &exphead;
1295
1296 /*
1297 * Insert in the list in alphabetical order.
1298 */
1299 while (ep2 && strcmp(ep2->ex_fsdir, ep->ex_fsdir) < 0) {
1300 epp = &ep2->ex_next;
1301 ep2 = ep2->ex_next;
1302 }
1303 if (ep2)
1304 ep->ex_next = ep2;
1305 *epp = ep;
1306 ep->ex_flag |= EX_LINKED;
1307 }
1308 nextline:
1309 if (dirhead) {
1310 free_dir(dirhead);
1311 dirhead = NULL;
1312 }
1313 }
1314 fclose(exp_file);
1315 }
1316
1317 /*
1318 * Get the export list from all specified files
1319 */
1320 void
1321 get_exportlist(void)
1322 {
1323 struct exportlist *ep, *ep2;
1324 struct grouplist *grp, *tgrp;
1325 struct statfs *fsp, *mntbufp;
1326 struct vfsconf vfc;
1327 char *dirp;
1328 int dirplen, num, i;
1329 int done;
1330
1331 dirp = NULL;
1332 dirplen = 0;
1333
1334 /*
1335 * First, get rid of the old list
1336 */
1337 ep = exphead;
1338 while (ep) {
1339 ep2 = ep;
1340 ep = ep->ex_next;
1341 free_exp(ep2);
1342 }
1343 exphead = NULL;
1344
1345 grp = grphead;
1346 while (grp) {
1347 tgrp = grp;
1348 grp = grp->gr_next;
1349 free_grp(tgrp);
1350 }
1351 grphead = NULL;
1352
1353 /*
1354 * And delete exports that are in the kernel for all local
1355 * filesystems.
1356 * XXX: Should know how to handle all local exportable filesystems.
1357 */
1358 num = getmntinfo(&mntbufp, MNT_NOWAIT);
1359 for (i = 0; i < num; i++) {
1360 union {
1361 struct ufs_args ua;
1362 struct iso_args ia;
1363 struct mfs_args ma;
1364 struct msdosfs_args da;
1365 struct ntfs_args na;
1366 } targs;
1367 struct export_args export;
1368
1369 fsp = &mntbufp[i];
1370 if (getvfsbyname(fsp->f_fstypename, &vfc) != 0) {
1371 syslog(LOG_ERR, "getvfsbyname() failed for %s",
1372 fsp->f_fstypename);
1373 continue;
1374 }
1375
1376 /*
1377 * Do not delete export for network filesystem by
1378 * passing "export" arg to mount().
1379 * It only makes sense to do this for local filesystems.
1380 */
1381 if (vfc.vfc_flags & VFCF_NETWORK)
1382 continue;
1383
1384 export.ex_flags = MNT_DELEXPORT;
1385 if (mountctl(fsp->f_mntonname, MOUNTCTL_SET_EXPORT, -1,
1386 &export, sizeof(export), NULL, 0) == 0) {
1387 } else if (!strcmp(fsp->f_fstypename, "mfs") ||
1388 !strcmp(fsp->f_fstypename, "ufs") ||
1389 !strcmp(fsp->f_fstypename, "msdos") ||
1390 !strcmp(fsp->f_fstypename, "ntfs") ||
1391 !strcmp(fsp->f_fstypename, "cd9660")) {
1392 bzero(&targs, sizeof targs);
1393 targs.ua.fspec = NULL;
1394 targs.ua.export.ex_flags = MNT_DELEXPORT;
1395 if (mount(fsp->f_fstypename, fsp->f_mntonname,
1396 fsp->f_flags | MNT_UPDATE,
1397 (caddr_t)&targs) < 0)
1398 syslog(LOG_ERR, "can't delete exports for %s",
1399 fsp->f_mntonname);
1400 }
1401 }
1402
1403 /*
1404 * Read in the exports file and build the list, calling
1405 * nmount() as we go along to push the export rules into the kernel.
1406 */
1407 done = 0;
1408 for (i = 0; exnames[i] != NULL; i++) {
1409 if (debug)
1410 warnx("reading exports from %s", exnames[i]);
1411 if ((exp_file = fopen(exnames[i], "r")) == NULL) {
1412 syslog(LOG_WARNING, "can't open %s", exnames[i]);
1413 continue;
1414 }
1415 get_exportlist_one();
1416 fclose(exp_file);
1417 done++;
1418 }
1419 if (done == 0) {
1420 syslog(LOG_ERR, "can't open any exports file");
1421 exit(2);
1422 }
1423 }
1424
1425 /*
1426 * Allocate an export list element
1427 */
1428 struct exportlist *
1429 get_exp(void)
1430 {
1431 struct exportlist *ep;
1432
1433 ep = (struct exportlist *)malloc(sizeof (struct exportlist));
1434 if (ep == NULL)
1435 out_of_mem();
1436 memset(ep, 0, sizeof(struct exportlist));
1437 return (ep);
1438 }
1439
1440 /*
1441 * Allocate a group list element
1442 */
1443 struct grouplist *
1444 get_grp(void)
1445 {
1446 struct grouplist *gp;
1447
1448 gp = (struct grouplist *)malloc(sizeof (struct grouplist));
1449 if (gp == NULL)
1450 out_of_mem();
1451 memset(gp, 0, sizeof(struct grouplist));
1452 return (gp);
1453 }
1454
1455 /*
1456 * Clean up upon an error in get_exportlist().
1457 */
1458 void
1459 getexp_err(struct exportlist *ep, struct grouplist *grp)
1460 {
1461 struct grouplist *tgrp;
1462
1463 if (!(opt_flags & OP_QUIET))
1464 syslog(LOG_ERR, "bad exports list line %s", line);
1465 if (ep && (ep->ex_flag & EX_LINKED) == 0)
1466 free_exp(ep);
1467 while (grp) {
1468 tgrp = grp;
1469 grp = grp->gr_next;
1470 free_grp(tgrp);
1471 }
1472 }
1473
1474 /*
1475 * Search the export list for a matching fs.
1476 */
1477 struct exportlist *
1478 ex_search(fsid_t *fsid)
1479 {
1480 struct exportlist *ep;
1481
1482 ep = exphead;
1483 while (ep) {
1484 if (ep->ex_fs.val[0] == fsid->val[0] &&
1485 ep->ex_fs.val[1] == fsid->val[1])
1486 return (ep);
1487 ep = ep->ex_next;
1488 }
1489 return (ep);
1490 }
1491
1492 /*
1493 * Add a directory path to the list.
1494 */
1495 char *
1496 add_expdir(struct dirlist **dpp, char *cp, int len)
1497 {
1498 struct dirlist *dp;
1499
1500 dp = (struct dirlist *)malloc(sizeof (struct dirlist) + len);
1501 if (dp == NULL)
1502 out_of_mem();
1503 dp->dp_left = *dpp;
1504 dp->dp_right = NULL;
1505 dp->dp_flag = 0;
1506 dp->dp_hosts = NULL;
1507 strcpy(dp->dp_dirp, cp);
1508 *dpp = dp;
1509 return (dp->dp_dirp);
1510 }
1511
1512 /*
1513 * Hang the dir list element off the dirpath binary tree as required
1514 * and update the entry for host.
1515 */
1516 void
1517 hang_dirp(struct dirlist *dp, struct grouplist *grp, struct exportlist *ep,
1518 int flags)
1519 {
1520 struct hostlist *hp;
1521 struct dirlist *dp2;
1522
1523 if (flags & OP_ALLDIRS) {
1524 if (ep->ex_defdir)
1525 free((caddr_t)dp);
1526 else
1527 ep->ex_defdir = dp;
1528 if (grp == NULL) {
1529 ep->ex_defdir->dp_flag |= DP_DEFSET;
1530 } else while (grp) {
1531 hp = get_ht();
1532 hp->ht_grp = grp;
1533 hp->ht_next = ep->ex_defdir->dp_hosts;
1534 ep->ex_defdir->dp_hosts = hp;
1535 grp = grp->gr_next;
1536 }
1537 } else {
1538
1539 /*
1540 * Loop through the directories adding them to the tree.
1541 */
1542 while (dp) {
1543 dp2 = dp->dp_left;
1544 add_dlist(&ep->ex_dirl, dp, grp, flags);
1545 dp = dp2;
1546 }
1547 }
1548 }
1549
1550 /*
1551 * Traverse the binary tree either updating a node that is already there
1552 * for the new directory or adding the new node.
1553 */
1554 void
1555 add_dlist(struct dirlist **dpp, struct dirlist *newdp, struct grouplist *grp,
1556 int flags)
1557 {
1558 struct dirlist *dp;
1559 struct hostlist *hp;
1560 int cmp;
1561
1562 dp = *dpp;
1563 if (dp) {
1564 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp);
1565 if (cmp > 0) {
1566 add_dlist(&dp->dp_left, newdp, grp, flags);
1567 return;
1568 } else if (cmp < 0) {
1569 add_dlist(&dp->dp_right, newdp, grp, flags);
1570 return;
1571 } else
1572 free((caddr_t)newdp);
1573 } else {
1574 dp = newdp;
1575 dp->dp_left = NULL;
1576 *dpp = dp;
1577 }
1578 if (grp) {
1579
1580 /*
1581 * Hang all of the host(s) off of the directory point.
1582 */
1583 do {
1584 hp = get_ht();
1585 hp->ht_grp = grp;
1586 hp->ht_next = dp->dp_hosts;
1587 dp->dp_hosts = hp;
1588 grp = grp->gr_next;
1589 } while (grp);
1590 } else {
1591 dp->dp_flag |= DP_DEFSET;
1592 }
1593 }
1594
1595 /*
1596 * Search for a dirpath on the export point.
1597 */
1598 struct dirlist *
1599 dirp_search(struct dirlist *dp, char *dirp)
1600 {
1601 int cmp;
1602
1603 if (dp) {
1604 cmp = strcmp(dp->dp_dirp, dirp);
1605 if (cmp > 0)
1606 return (dirp_search(dp->dp_left, dirp));
1607 else if (cmp < 0)
1608 return (dirp_search(dp->dp_right, dirp));
1609 else
1610 return (dp);
1611 }
1612 return (dp);
1613 }
1614
1615 /*
1616 * Scan for a host match in a directory tree.
1617 */
1618 int
1619 chk_host(struct dirlist *dp, struct sockaddr *saddr, int *defsetp,
1620 int *hostsetp)
1621 {
1622 struct hostlist *hp;
1623 struct grouplist *grp;
1624 struct addrinfo *ai;
1625
1626 if (dp) {
1627 if (dp->dp_flag & DP_DEFSET)
1628 *defsetp = dp->dp_flag;
1629 hp = dp->dp_hosts;
1630 while (hp) {
1631 grp = hp->ht_grp;
1632 switch (grp->gr_type) {
1633 case GT_HOST:
1634 ai = grp->gr_ptr.gt_addrinfo;
1635 for (; ai; ai = ai->ai_next) {
1636 if (!sacmp(ai->ai_addr, saddr, NULL)) {
1637 *hostsetp =
1638 (hp->ht_flag | DP_HOSTSET);
1639 return (1);
1640 }
1641 }
1642 break;
1643 case GT_NET:
1644 if (!sacmp(saddr, (struct sockaddr *)
1645 &grp->gr_ptr.gt_net.nt_net,
1646 (struct sockaddr *)
1647 &grp->gr_ptr.gt_net.nt_mask)) {
1648 *hostsetp = (hp->ht_flag | DP_HOSTSET);
1649 return (1);
1650 }
1651 break;
1652 }
1653 hp = hp->ht_next;
1654 }
1655 }
1656 return (0);
1657 }
1658
1659 /*
1660 * Scan tree for a host that matches the address.
1661 */
1662 int
1663 scan_tree(struct dirlist *dp, struct sockaddr *saddr)
1664 {
1665 int defset, hostset;
1666
1667 if (dp) {
1668 if (scan_tree(dp->dp_left, saddr))
1669 return (1);
1670 if (chk_host(dp, saddr, &defset, &hostset))
1671 return (1);
1672 if (scan_tree(dp->dp_right, saddr))
1673 return (1);
1674 }
1675 return (0);
1676 }
1677
1678 /*
1679 * Traverse the dirlist tree and free it up.
1680 */
1681 void
1682 free_dir(struct dirlist *dp)
1683 {
1684
1685 if (dp) {
1686 free_dir(dp->dp_left);
1687 free_dir(dp->dp_right);
1688 free_host(dp->dp_hosts);
1689 free((caddr_t)dp);
1690 }
1691 }
1692
1693 /*
1694 * Parse the option string and update fields.
1695 * Option arguments may either be -<option>=<value> or
1696 * -<option> <value>
1697 */
1698 int
1699 do_opt(char **cpp, char **endcpp, struct exportlist *ep, struct grouplist *grp,
1700 int *has_hostp, int *exflagsp, struct ucred *cr)
1701 {
1702 char *cpoptarg, *cpoptend;
1703 char *cp, *endcp, *cpopt, savedc, savedc2;
1704 int allflag, usedarg;
1705
1706 savedc2 = '\0';
1707 cpopt = *cpp;
1708 cpopt++;
1709 cp = *endcpp;
1710 savedc = *cp;
1711 *cp = '\0';
1712 while (cpopt && *cpopt) {
1713 allflag = 1;
1714 usedarg = -2;
1715 if ((cpoptend = strchr(cpopt, ','))) {
1716 *cpoptend++ = '\0';
1717 if ((cpoptarg = strchr(cpopt, '=')))
1718 *cpoptarg++ = '\0';
1719 } else {
1720 if ((cpoptarg = strchr(cpopt, '=')))
1721 *cpoptarg++ = '\0';
1722 else {
1723 *cp = savedc;
1724 nextfield(&cp, &endcp);
1725 **endcpp = '\0';
1726 if (endcp > cp && *cp != '-') {
1727 cpoptarg = cp;
1728 savedc2 = *endcp;
1729 *endcp = '\0';
1730 usedarg = 0;
1731 }
1732 }
1733 }
1734 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) {
1735 *exflagsp |= MNT_EXRDONLY;
1736 } else if (cpoptarg && (!strcmp(cpopt, "maproot") ||
1737 !(allflag = strcmp(cpopt, "mapall")) ||
1738 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) {
1739 usedarg++;
1740 parsecred(cpoptarg, cr);
1741 if (allflag == 0) {
1742 *exflagsp |= MNT_EXPORTANON;
1743 opt_flags |= OP_MAPALL;
1744 } else
1745 opt_flags |= OP_MAPROOT;
1746 } else if (cpoptarg && (!strcmp(cpopt, "mask") ||
1747 !strcmp(cpopt, "m"))) {
1748 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) {
1749 syslog(LOG_ERR, "bad mask: %s", cpoptarg);
1750 return (1);
1751 }
1752 usedarg++;
1753 opt_flags |= OP_MASK;
1754 } else if (cpoptarg && (!strcmp(cpopt, "network") ||
1755 !strcmp(cpopt, "n"))) {
1756 if (strchr(cpoptarg, '/') != NULL) {
1757 if (debug)
1758 fprintf(stderr, "setting OP_MASKLEN\n");
1759 opt_flags |= OP_MASKLEN;
1760 }
1761 if (grp->gr_type != GT_NULL) {
1762 syslog(LOG_ERR, "network/host conflict");
1763 return (1);
1764 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) {
1765 syslog(LOG_ERR, "bad net: %s", cpoptarg);
1766 return (1);
1767 }
1768 grp->gr_type = GT_NET;
1769 *has_hostp = 1;
1770 usedarg++;
1771 opt_flags |= OP_NET;
1772 } else if (!strcmp(cpopt, "alldirs")) {
1773 opt_flags |= OP_ALLDIRS;
1774 } else if (!strcmp(cpopt, "public")) {
1775 *exflagsp |= MNT_EXPUBLIC;
1776 } else if (!strcmp(cpopt, "webnfs")) {
1777 *exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON);
1778 opt_flags |= OP_MAPALL;
1779 } else if (cpoptarg && !strcmp(cpopt, "index")) {
1780 ep->ex_indexfile = strdup(cpoptarg);
1781 } else if (!strcmp(cpopt, "quiet")) {
1782 opt_flags |= OP_QUIET;
1783 } else {
1784 syslog(LOG_ERR, "bad opt %s", cpopt);
1785 return (1);
1786 }
1787 if (usedarg >= 0) {
1788 *endcp = savedc2;
1789 **endcpp = savedc;
1790 if (usedarg > 0) {
1791 *cpp = cp;
1792 *endcpp = endcp;
1793 }
1794 return (0);
1795 }
1796 cpopt = cpoptend;
1797 }
1798 **endcpp = savedc;
1799 return (0);
1800 }
1801
1802 /*
1803 * Translate a character string to the corresponding list of network
1804 * addresses for a hostname.
1805 */
1806 int
1807 get_host(char *cp, struct grouplist *grp, struct grouplist *tgrp)
1808 {
1809 struct grouplist *checkgrp;
1810 struct addrinfo *ai, *tai, hints;
1811 int ecode;
1812 char host[NI_MAXHOST];
1813
1814 if (grp->gr_type != GT_NULL) {
1815 syslog(LOG_ERR, "Bad netgroup type for ip host %s", cp);
1816 return (1);
1817 }
1818 memset(&hints, 0, sizeof hints);
1819 hints.ai_flags = AI_CANONNAME;
1820 hints.ai_protocol = IPPROTO_UDP;
1821 ecode = getaddrinfo(cp, NULL, &hints, &ai);
1822 if (ecode != 0) {
1823 syslog(LOG_ERR,"can't get address info for host %s", cp);
1824 return 1;
1825 }
1826 grp->gr_ptr.gt_addrinfo = ai;
1827 while (ai != NULL) {
1828 if (ai->ai_canonname == NULL) {
1829 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, host,
1830 sizeof host, NULL, 0, NI_NUMERICHOST) != 0)
1831 strlcpy(host, "?", sizeof(host));
1832 ai->ai_canonname = strdup(host);
1833 ai->ai_flags |= AI_CANONNAME;
1834 }
1835 if (debug)
1836 fprintf(stderr, "got host %s\n", ai->ai_canonname);
1837 /*
1838 * Sanity check: make sure we don't already have an entry
1839 * for this host in the grouplist.
1840 */
1841 for (checkgrp = tgrp; checkgrp != NULL;
1842 checkgrp = checkgrp->gr_next) {
1843 if (checkgrp->gr_type != GT_HOST)
1844 continue;
1845 for (tai = checkgrp->gr_ptr.gt_addrinfo; tai != NULL;
1846 tai = tai->ai_next) {
1847 if (sacmp(tai->ai_addr, ai->ai_addr, NULL) != 0)
1848 continue;
1849 if (debug)
1850 fprintf(stderr,
1851 "ignoring duplicate host %s\n",
1852 ai->ai_canonname);
1853 grp->gr_type = GT_IGNORE;
1854 return (0);
1855 }
1856 }
1857 ai = ai->ai_next;
1858 }
1859 grp->gr_type = GT_HOST;
1860 return (0);
1861 }
1862
1863 /*
1864 * Free up an exports list component
1865 */
1866 void
1867 free_exp(struct exportlist *ep)
1868 {
1869
1870 if (ep->ex_defdir) {
1871 free_host(ep->ex_defdir->dp_hosts);
1872 free((caddr_t)ep->ex_defdir);
1873 }
1874 if (ep->ex_fsdir)
1875 free(ep->ex_fsdir);
1876 if (ep->ex_indexfile)
1877 free(ep->ex_indexfile);
1878 free_dir(ep->ex_dirl);
1879 free((caddr_t)ep);
1880 }
1881
1882 /*
1883 * Free hosts.
1884 */
1885 void
1886 free_host(struct hostlist *hp)
1887 {
1888 struct hostlist *hp2;
1889
1890 while (hp) {
1891 hp2 = hp;
1892 hp = hp->ht_next;
1893 free((caddr_t)hp2);
1894 }
1895 }
1896
1897 struct hostlist *
1898 get_ht(void)
1899 {
1900 struct hostlist *hp;
1901
1902 hp = (struct hostlist *)malloc(sizeof (struct hostlist));
1903 if (hp == NULL)
1904 out_of_mem();
1905 hp->ht_next = NULL;
1906 hp->ht_flag = 0;
1907 return (hp);
1908 }
1909
1910 /*
1911 * Out of memory, fatal
1912 */
1913 void
1914 out_of_mem(void)
1915 {
1916
1917 syslog(LOG_ERR, "out of memory");
1918 exit(2);
1919 }
1920
1921 /*
1922 * Do the mount syscall with the update flag to push the export info into
1923 * the kernel.
1924 */
1925 int
1926 do_mount(struct exportlist *ep, struct grouplist *grp, int exflags,
1927 struct ucred *anoncrp, char *dirp, int dirplen, struct statfs *fsb)
1928 {
1929 struct statfs fsb1;
1930 struct addrinfo *ai;
1931 struct export_args *eap;
1932 char *cp = NULL;
1933 int done;
1934 char savedc = '\0';
1935 union {
1936 struct ufs_args ua;
1937 struct iso_args ia;
1938 struct mfs_args ma;
1939 struct msdosfs_args da;
1940 struct ntfs_args na;
1941 } args;
1942
1943 bzero(&args, sizeof args);
1944 /* XXX, we assume that all xx_args look like ufs_args. */
1945 args.ua.fspec = 0;
1946 eap = &args.ua.export;
1947
1948 eap->ex_flags = exflags;
1949 eap->ex_anon = *anoncrp;
1950 eap->ex_indexfile = ep->ex_indexfile;
1951 if (grp->gr_type == GT_HOST)
1952 ai = grp->gr_ptr.gt_addrinfo;
1953 else
1954 ai = NULL;
1955 done = FALSE;
1956 while (!done) {
1957 switch (grp->gr_type) {
1958 case GT_HOST:
1959 if (ai->ai_addr->sa_family == AF_INET6 && have_v6 == 0)
1960 goto skip;
1961 eap->ex_addr = ai->ai_addr;
1962 eap->ex_addrlen = ai->ai_addrlen;
1963 eap->ex_masklen = 0;
1964 break;
1965 case GT_NET:
1966 if (grp->gr_ptr.gt_net.nt_net.ss_family == AF_INET6 &&
1967 have_v6 == 0)
1968 goto skip;
1969 eap->ex_addr =
1970 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_net;
1971 eap->ex_addrlen = args.ua.export.ex_addr->sa_len;
1972 eap->ex_mask =
1973 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask;
1974 eap->ex_masklen = args.ua.export.ex_mask->sa_len;
1975 break;
1976 case GT_DEFAULT:
1977 eap->ex_addr = NULL;
1978 eap->ex_addrlen = 0;
1979 eap->ex_mask = NULL;
1980 eap->ex_masklen = 0;
1981 break;
1982 case GT_IGNORE:
1983 return(0);
1984 break;
1985 default:
1986 syslog(LOG_ERR, "bad grouptype");
1987 if (cp)
1988 *cp = savedc;
1989 return (1);
1990 }
1991
1992 /*
1993 * XXX:
1994 * Maybe I should just use the fsb->f_mntonname path instead
1995 * of looping back up the dirp to the mount point??
1996 * Also, needs to know how to export all types of local
1997 * exportable filesystems and not just "ufs".
1998 */
1999 for (;;) {
2000 int r;
2001
2002 r = mountctl(fsb->f_mntonname, MOUNTCTL_SET_EXPORT,
2003 -1,
2004 &args.ua.export, sizeof(args.ua.export),
2005 NULL, 0);
2006 if (r < 0 && errno == EOPNOTSUPP) {
2007 r = mount(fsb->f_fstypename, dirp,
2008 fsb->f_flags | MNT_UPDATE,
2009 (caddr_t)&args);
2010 }
2011 if (r >= 0)
2012 break;
2013 if (cp)
2014 *cp-- = savedc;
2015 else
2016 cp = dirp + dirplen - 1;
2017 if (opt_flags & OP_QUIET)
2018 return (1);
2019 if (errno == EPERM) {
2020 if (debug)
2021 warnx("can't change attributes for %s",
2022 dirp);
2023 syslog(LOG_ERR,
2024 "can't change attributes for %s", dirp);
2025 return (1);
2026 }
2027 if (opt_flags & OP_ALLDIRS) {
2028 if (errno == EINVAL)
2029 syslog(LOG_ERR,
2030 "-alldirs requested but %s is not a filesystem mountpoint",
2031 dirp);
2032 else
2033 syslog(LOG_ERR,
2034 "could not remount %s: %m",
2035 dirp);
2036 return (1);
2037 }
2038 /* back up over the last component */
2039 while (*cp == '/' && cp > dirp)
2040 cp--;
2041 while (*(cp - 1) != '/' && cp > dirp)
2042 cp--;
2043 if (cp == dirp) {
2044 if (debug)
2045 warnx("mnt unsucc");
2046 syslog(LOG_ERR, "can't export %s", dirp);
2047 return (1);
2048 }
2049 savedc = *cp;
2050 *cp = '\0';
2051 /* Check that we're still on the same filesystem. */
2052 if (statfs(dirp, &fsb1) != 0 || bcmp(&fsb1.f_fsid,
2053 &fsb->f_fsid, sizeof(fsb1.f_fsid)) != 0) {
2054 *cp = savedc;
2055 syslog(LOG_ERR, "can't export %s", dirp);
2056 return (1);
2057 }
2058 }
2059 skip:
2060 if (ai != NULL)
2061 ai = ai->ai_next;
2062 if (ai == NULL)
2063 done = TRUE;
2064 }
2065 if (cp)
2066 *cp = savedc;
2067 return (0);
2068 }
2069
2070 /*
2071 * Translate a net address.
2072 *
2073 * If `maskflg' is nonzero, then `cp' is a netmask, not a network address.
2074 */
2075 int
2076 get_net(char *cp, struct netmsk *net, int maskflg)
2077 {
2078 struct netent *np = NULL;
2079 char *name, *p, *prefp;
2080 struct sockaddr_in sin;
2081 struct sockaddr *sa = NULL;
2082 struct addrinfo hints, *ai = NULL;
2083 char netname[NI_MAXHOST];
2084 long preflen;
2085
2086 p = prefp = NULL;
2087 if ((opt_flags & OP_MASKLEN) && !maskflg) {
2088 p = strchr(cp, '/');
2089 *p = '\0';
2090 prefp = p + 1;
2091 }
2092
2093 /*
2094 * Check for a numeric address first. We wish to avoid
2095 * possible DNS lookups in getnetbyname().
2096 */
2097 if (isxdigit(*cp) || *cp == ':') {
2098 memset(&hints, 0, sizeof hints);
2099 /* Ensure the mask and the network have the same family. */
2100 if (maskflg && (opt_flags & OP_NET))
2101 hints.ai_family = net->nt_net.ss_family;
2102 else if (!maskflg && (opt_flags & OP_HAVEMASK))
2103 hints.ai_family = net->nt_mask.ss_family;
2104 else
2105 hints.ai_family = AF_UNSPEC;
2106 hints.ai_flags = AI_NUMERICHOST;
2107 if (getaddrinfo(cp, NULL, &hints, &ai) == 0)
2108 sa = ai->ai_addr;
2109 if (sa != NULL && ai->ai_family == AF_INET) {
2110 /*
2111 * The address in `cp' is really a network address, so
2112 * use inet_network() to re-interpret this correctly.
2113 * e.g. "127.1" means 127.1.0.0, not 127.0.0.1.
2114 */
2115 bzero(&sin, sizeof sin);
2116 sin.sin_family = AF_INET;
2117 sin.sin_len = sizeof sin;
2118 sin.sin_addr = inet_makeaddr(inet_network(cp), 0);
2119 if (debug)
2120 fprintf(stderr, "get_net: v4 addr %s\n",
2121 inet_ntoa(sin.sin_addr));
2122 sa = (struct sockaddr *)&sin;
2123 }
2124 }
2125 if (sa == NULL && (np = getnetbyname(cp)) != NULL) {
2126 bzero(&sin, sizeof sin);
2127 sin.sin_family = AF_INET;
2128 sin.sin_len = sizeof sin;
2129 sin.sin_addr = inet_makeaddr(np->n_net, 0);
2130 sa = (struct sockaddr *)&sin;
2131 }
2132 if (sa == NULL)
2133 goto fail;
2134
2135 if (maskflg) {
2136 /* The specified sockaddr is a mask. */
2137 if (checkmask(sa) != 0)
2138 goto fail;
2139 bcopy(sa, &net->nt_mask, sa->sa_len);
2140 opt_flags |= OP_HAVEMASK;
2141 } else {
2142 /* The specified sockaddr is a network address. */
2143 bcopy(sa, &net->nt_net, sa->sa_len);
2144
2145 /* Get a network name for the export list. */
2146 if (np) {
2147 name = np->n_name;
2148 } else if (getnameinfo(sa, sa->sa_len, netname, sizeof netname,
2149 NULL, 0, NI_NUMERICHOST) == 0) {
2150 name = netname;
2151 } else {
2152 goto fail;
2153 }
2154 if ((net->nt_name = strdup(name)) == NULL)
2155 out_of_mem();
2156
2157 /*
2158 * Extract a mask from either a "/<masklen>" suffix, or
2159 * from the class of an IPv4 address.
2160 */
2161 if (opt_flags & OP_MASKLEN) {
2162 preflen = strtol(prefp, NULL, 10);
2163 if (preflen < 0L || preflen == LONG_MAX)
2164 goto fail;
2165 bcopy(sa, &net->nt_mask, sa->sa_len);
2166 if (makemask(&net->nt_mask, (int)preflen) != 0)
2167 goto fail;
2168 opt_flags |= OP_HAVEMASK;
2169 *p = '/';
2170 } else if (sa->sa_family == AF_INET &&
2171 (opt_flags & OP_MASK) == 0) {
2172 in_addr_t addr;
2173
2174 addr = ((struct sockaddr_in *)sa)->sin_addr.s_addr;
2175 if (IN_CLASSA(addr))
2176 preflen = 8;
2177 else if (IN_CLASSB(addr))
2178 preflen = 16;
2179 else if (IN_CLASSC(addr))
2180 preflen = 24;
2181 else if (IN_CLASSD(addr))
2182 preflen = 28;
2183 else
2184 preflen = 32; /* XXX */
2185
2186 bcopy(sa, &net->nt_mask, sa->sa_len);
2187 makemask(&net->nt_mask, (int)preflen);
2188 opt_flags |= OP_HAVEMASK;
2189 }
2190 }
2191
2192 if (ai)
2193 freeaddrinfo(ai);
2194 return 0;
2195
2196 fail:
2197 if (ai)
2198 freeaddrinfo(ai);
2199 return 1;
2200 }
2201
2202 /*
2203 * Parse out the next white space separated field
2204 */
2205 void
2206 nextfield(char **cp, char **endcp)
2207 {
2208 char *p;
2209
2210 p = *cp;
2211 while (*p == ' ' || *p == '\t')
2212 p++;
2213 if (*p == '\n' || *p == '\0')
2214 *cp = *endcp = p;
2215 else {
2216 *cp = p++;
2217 while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0')
2218 p++;
2219 *endcp = p;
2220 }
2221 }
2222
2223 /*
2224 * Get an exports file line. Skip over blank lines and handle line
2225 * continuations.
2226 */
2227 int
2228 get_line(void)
2229 {
2230 char *p, *cp;
2231 size_t len;
2232 int totlen, cont_line;
2233
2234 /*
2235 * Loop around ignoring blank lines and getting all continuation lines.
2236 */
2237 p = line;
2238 totlen = 0;
2239 do {
2240 if ((p = fgetln(exp_file, &len)) == NULL)
2241 return (0);
2242 cp = p + len - 1;
2243 cont_line = 0;
2244 while (cp >= p &&
2245 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) {
2246 if (*cp == '\\')
2247 cont_line = 1;
2248 cp--;
2249 len--;
2250 }
2251 if (cont_line) {
2252 *++cp = ' ';
2253 len++;
2254 }
2255 if (linesize < len + totlen + 1) {
2256 linesize = len + totlen + 1;
2257 line = realloc(line, linesize);
2258 if (line == NULL)
2259 out_of_mem();
2260 }
2261 memcpy(line + totlen, p, len);
2262 totlen += len;
2263 line[totlen] = '\0';
2264 } while (totlen == 0 || cont_line);
2265 return (1);
2266 }
2267
2268 /*
2269 * Parse a description of a credential.
2270 */
2271 void
2272 parsecred(char *namelist, struct ucred *cr)
2273 {
2274 char *name;
2275 int cnt;
2276 char *names;
2277 struct passwd *pw;
2278 struct group *gr;
2279 gid_t ngroups, groups[NGROUPS + 1];
2280
2281 /*
2282 * Set up the unprivileged user.
2283 */
2284 cr->cr_ref = 1;
2285 cr->cr_uid = -2;
2286 cr->cr_groups[0] = -2;
2287 cr->cr_ngroups = 1;
2288 /*
2289 * Get the user's password table entry.
2290 */
2291 names = strsep(&namelist, " \t\n");
2292 name = strsep(&names, ":");
2293 if (isdigit(*name) || *name == '-')
2294 pw = getpwuid(atoi(name));
2295 else
2296 pw = getpwnam(name);
2297 /*
2298 * Credentials specified as those of a user.
2299 */
2300 if (names == NULL) {
2301 if (pw == NULL) {
2302 syslog(LOG_ERR, "unknown user: %s", name);
2303 return;
2304 }
2305 cr->cr_uid = pw->pw_uid;
2306 ngroups = NGROUPS + 1;
2307 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups))
2308 syslog(LOG_ERR, "too many groups");
2309 /*
2310 * Compress out duplicate
2311 */
2312 cr->cr_ngroups = ngroups - 1;
2313 cr->cr_groups[0] = groups[0];
2314 for (cnt = 2; cnt < ngroups; cnt++)
2315 cr->cr_groups[cnt - 1] = groups[cnt];
2316 return;
2317 }
2318 /*
2319 * Explicit credential specified as a colon separated list:
2320 * uid:gid:gid:...
2321 */
2322 if (pw != NULL)
2323 cr->cr_uid = pw->pw_uid;
2324 else if (isdigit(*name) || *name == '-')
2325 cr->cr_uid = atoi(name);
2326 else {
2327 syslog(LOG_ERR, "unknown user: %s", name);
2328 return;
2329 }
2330 cr->cr_ngroups = 0;
2331 while (names != NULL && *names != '\0' && cr->cr_ngroups < NGROUPS) {
2332 name = strsep(&names, ":");
2333 if (isdigit(*name) || *name == '-') {
2334 cr->cr_groups[cr->cr_ngroups++] = atoi(name);
2335 } else {
2336 if ((gr = getgrnam(name)) == NULL) {
2337 syslog(LOG_ERR, "unknown group: %s", name);
2338 continue;
2339 }
2340 cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid;
2341 }
2342 }
2343 if (names != NULL && *names != '\0' && cr->cr_ngroups == NGROUPS)
2344 syslog(LOG_ERR, "too many groups");
2345 }
2346
2347 #define STRSIZ (RPCMNT_NAMELEN+RPCMNT_PATHLEN+50)
2348 /*
2349 * Routines that maintain the remote mounttab
2350 */
2351 void
2352 get_mountlist(void)
2353 {
2354 struct mountlist *mlp, **mlpp;
2355 char *host, *dirp, *cp;
2356 char str[STRSIZ];
2357 FILE *mlfile;
2358
2359 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) {
2360 if (errno == ENOENT)
2361 return;
2362 else {
2363 syslog(LOG_ERR, "can't open %s", _PATH_RMOUNTLIST);
2364 return;
2365 }
2366 }
2367 mlpp = &mlhead;
2368 while (fgets(str, STRSIZ, mlfile) != NULL) {
2369 cp = str;
2370 host = strsep(&cp, " \t\n");
2371 dirp = strsep(&cp, " \t\n");
2372 if (host == NULL || dirp == NULL)
2373 continue;
2374 mlp = (struct mountlist *)malloc(sizeof (*mlp));
2375 if (mlp == NULL)
2376 out_of_mem();
2377 strncpy(mlp->ml_host, host, RPCMNT_NAMELEN);
2378 mlp->ml_host[RPCMNT_NAMELEN] = '\0';
2379 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN);
2380 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0';
2381 mlp->ml_next = NULL;
2382 *mlpp = mlp;
2383 mlpp = &mlp->ml_next;
2384 }
2385 fclose(mlfile);
2386 }
2387
2388 void
2389 del_mlist(char *hostp, char *dirp)
2390 {
2391 struct mountlist *mlp, **mlpp;
2392 struct mountlist *mlp2;
2393 FILE *mlfile;
2394 int fnd = 0;
2395
2396 mlpp = &mlhead;
2397 mlp = mlhead;
2398 while (mlp) {
2399 if (!strcmp(mlp->ml_host, hostp) &&
2400 (!dirp || !strcmp(mlp->ml_dirp, dirp))) {
2401 fnd = 1;
2402 mlp2 = mlp;
2403 *mlpp = mlp = mlp->ml_next;
2404 free((caddr_t)mlp2);
2405 } else {
2406 mlpp = &mlp->ml_next;
2407 mlp = mlp->ml_next;
2408 }
2409 }
2410 if (fnd) {
2411 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) {
2412 syslog(LOG_ERR,"can't update %s", _PATH_RMOUNTLIST);
2413 return;
2414 }
2415 mlp = mlhead;
2416 while (mlp) {
2417 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
2418 mlp = mlp->ml_next;
2419 }
2420 fclose(mlfile);
2421 }
2422 }
2423
2424 void
2425 add_mlist(char *hostp, char *dirp)
2426 {
2427 struct mountlist *mlp, **mlpp;
2428 FILE *mlfile;
2429
2430 mlpp = &mlhead;
2431 mlp = mlhead;
2432 while (mlp) {
2433 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp))
2434 return;
2435 mlpp = &mlp->ml_next;
2436 mlp = mlp->ml_next;
2437 }
2438 mlp = (struct mountlist *)malloc(sizeof (*mlp));
2439 if (mlp == NULL)
2440 out_of_mem();
2441 strncpy(mlp->ml_host, hostp, RPCMNT_NAMELEN);
2442 mlp->ml_host[RPCMNT_NAMELEN] = '\0';
2443 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN);
2444 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0';
2445 mlp->ml_next = NULL;
2446 *mlpp = mlp;
2447 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) {
2448 syslog(LOG_ERR, "can't update %s", _PATH_RMOUNTLIST);
2449 return;
2450 }
2451 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
2452 fclose(mlfile);
2453 }
2454
2455 /*
2456 * Free up a group list.
2457 */
2458 void
2459 free_grp(struct grouplist *grp)
2460 {
2461 if (grp->gr_type == GT_HOST) {
2462 if (grp->gr_ptr.gt_addrinfo != NULL)
2463 freeaddrinfo(grp->gr_ptr.gt_addrinfo);
2464 } else if (grp->gr_type == GT_NET) {
2465 if (grp->gr_ptr.gt_net.nt_name)
2466 free(grp->gr_ptr.gt_net.nt_name);
2467 }
2468 free((caddr_t)grp);
2469 }
2470
2471 #ifdef DEBUG
2472 void
2473 SYSLOG(int pri, const char *fmt, ...)
2474 {
2475 va_list ap;
2476
2477 va_start(ap, fmt);
2478 vfprintf(stderr, fmt, ap);
2479 va_end(ap);
2480 }
2481 #endif /* DEBUG */
2482
2483 /*
2484 * Check options for consistency.
2485 */
2486 int
2487 check_options(struct dirlist *dp)
2488 {
2489
2490 if (dp == NULL)
2491 return (1);
2492 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL)) {
2493 syslog(LOG_ERR, "-mapall and -maproot mutually exclusive");
2494 return (1);
2495 }
2496 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) {
2497 syslog(LOG_ERR, "-mask requires -network");
2498 return (1);
2499 }
2500 if ((opt_flags & OP_NET) && (opt_flags & OP_HAVEMASK) == 0) {
2501 syslog(LOG_ERR, "-network requires mask specification");
2502 return (1);
2503 }
2504 if ((opt_flags & OP_MASK) && (opt_flags & OP_MASKLEN)) {
2505 syslog(LOG_ERR, "-mask and /masklen are mutually exclusive");
2506 return (1);
2507 }
2508 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) {
2509 syslog(LOG_ERR, "-alldirs has multiple directories");
2510 return (1);
2511 }
2512 return (0);
2513 }
2514
2515 /*
2516 * Check an absolute directory path for any symbolic links. Return true
2517 */
2518 int
2519 check_dirpath(char *dirp)
2520 {
2521 char *cp;
2522 int ret = 1;
2523 struct stat sb;
2524
2525 cp = dirp + 1;
2526 while (*cp && ret) {
2527 if (*cp == '/') {
2528 *cp = '\0';
2529 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode))
2530 ret = 0;
2531 *cp = '/';
2532 }
2533 cp++;
2534 }
2535 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode))
2536 ret = 0;
2537 return (ret);
2538 }
2539
2540 /*
2541 * Make a netmask according to the specified prefix length. The ss_family
2542 * and other non-address fields must be initialised before calling this.
2543 */
2544 int
2545 makemask(struct sockaddr_storage *ssp, int bitlen)
2546 {
2547 u_char *p;
2548 int bits, i, len;
2549
2550 if ((p = sa_rawaddr((struct sockaddr *)ssp, &len)) == NULL)
2551 return (-1);
2552 if (bitlen > len * CHAR_BIT)
2553 return (-1);
2554 for (i = 0; i < len; i++) {
2555 bits = (bitlen > CHAR_BIT) ? CHAR_BIT : bitlen;
2556 *p++ = (1 << bits) - 1;
2557 bitlen -= bits;
2558 }
2559 return 0;
2560 }
2561
2562 /*
2563 * Check that the sockaddr is a valid netmask. Returns 0 if the mask
2564 * is acceptable (i.e. of the form 1...10....0).
2565 */
2566 int
2567 checkmask(struct sockaddr *sa)
2568 {
2569 u_char *mask;
2570 int i, len;
2571
2572 if ((mask = sa_rawaddr(sa, &len)) == NULL)
2573 return (-1);
2574
2575 for (i = 0; i < len; i++)
2576 if (mask[i] != 0xff)
2577 break;
2578 if (i < len) {
2579 if (~mask[i] & (u_char)(~mask[i] + 1))
2580 return (-1);
2581 i++;
2582 }
2583 for (; i < len; i++)
2584 if (mask[i] != 0)
2585 return (-1);
2586 return (0);
2587 }
2588
2589 /*
2590 * Compare two sockaddrs according to a specified mask. Return zero if
2591 * `sa1' matches `sa2' when filtered by the netmask in `samask'.
2592 * If samask is NULL, perform a full comparision.
2593 */
2594 int
2595 sacmp(struct sockaddr *sa1, struct sockaddr *sa2, struct sockaddr *samask)
2596 {
2597 unsigned char *p1, *p2, *mask;
2598 int len, i;
2599
2600 if (sa1->sa_family != sa2->sa_family ||
2601 (p1 = sa_rawaddr(sa1, &len)) == NULL ||
2602 (p2 = sa_rawaddr(sa2, NULL)) == NULL)
2603 return (1);
2604
2605 switch (sa1->sa_family) {
2606 case AF_INET6:
2607 if (((struct sockaddr_in6 *)sa1)->sin6_scope_id !=
2608 ((struct sockaddr_in6 *)sa2)->sin6_scope_id)
2609 return (1);
2610 break;
2611 }
2612
2613 /* Simple binary comparison if no mask specified. */
2614 if (samask == NULL)
2615 return (memcmp(p1, p2, len));
2616
2617 /* Set up the mask, and do a mask-based comparison. */
2618 if (sa1->sa_family != samask->sa_family ||
2619 (mask = sa_rawaddr(samask, NULL)) == NULL)
2620 return (1);
2621
2622 for (i = 0; i < len; i++)
2623 if ((p1[i] & mask[i]) != (p2[i] & mask[i]))
2624 return (1);
2625 return (0);
2626 }
2627
2628 /*
2629 * Return a pointer to the part of the sockaddr that contains the
2630 * raw address, and set *nbytes to its length in bytes. Returns
2631 * NULL if the address family is unknown.
2632 */
2633 void *
2634 sa_rawaddr(struct sockaddr *sa, int *nbytes) {
2635 void *p;
2636 int len;
2637
2638 switch (sa->sa_family) {
2639 case AF_INET:
2640 len = sizeof(((struct sockaddr_in *)sa)->sin_addr);
2641 p = &((struct sockaddr_in *)sa)->sin_addr;
2642 break;
2643 case AF_INET6:
2644 len = sizeof(((struct sockaddr_in6 *)sa)->sin6_addr);
2645 p = &((struct sockaddr_in6 *)sa)->sin6_addr;
2646 break;
2647 default:
2648 p = NULL;
2649 len = 0;
2650 }
2651
2652 if (nbytes != NULL)
2653 *nbytes = len;
2654 return (p);
2655 }
2656
2657 void
2658 huphandler(int sig)
2659 {
2660 got_sighup = 1;
2661 }
2662
2663 void terminate(int sig)
2664 {
2665 pidfile_remove(pfh);
2666 rpcb_unset(RPCPROG_MNT, RPCMNT_VER1, NULL);
2667 rpcb_unset(RPCPROG_MNT, RPCMNT_VER3, NULL);
2668 exit (0);
2669 }
DragonFly BSD