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if_iwm - Fix channel list iteration in iwm_mvm_config_umac_scan().
[dragonfly.git] / sbin / mountd / mountd.c
blob6ddf9987bd9f0781a52180e73f9e1abcfb9179a1
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 != 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 ((fsb.f_flags & MNT_AUTOMOUNTED) != 0)
1145 syslog(LOG_ERR, "Warning: exporting of "
1146 "automounted fs %s not supported", cp);
1147 if (got_nondir) {
1148 syslog(LOG_ERR, "dirs must be first");
1149 getexp_err(ep, tgrp);
1150 goto nextline;
1151 }
1152 if (ep) {
1153 if (ep->ex_fs.val[0] != fsb.f_fsid.val[0] ||
1154 ep->ex_fs.val[1] != fsb.f_fsid.val[1]) {
1155 getexp_err(ep, tgrp);
1156 goto nextline;
1157 }
1158 } else {
1159 /*
1160 * See if this directory is already
1161 * in the list.
1162 */
1163 ep = ex_search(&fsb.f_fsid);
1164 if (ep == NULL) {
1165 ep = get_exp();
1166 ep->ex_fs = fsb.f_fsid;
1167 ep->ex_fsdir = (char *)
1168 malloc(strlen(fsb.f_mntonname) + 1);
1169 if (ep->ex_fsdir)
1170 strcpy(ep->ex_fsdir,
1171 fsb.f_mntonname);
1172 else
1173 out_of_mem();
1174 if (debug)
1175 warnx("making new ep fs=0x%x,0x%x",
1176 fsb.f_fsid.val[0],
1177 fsb.f_fsid.val[1]);
1178 } else if (debug)
1179 warnx("found ep fs=0x%x,0x%x",
1180 fsb.f_fsid.val[0],
1181 fsb.f_fsid.val[1]);
1182 }
1183
1184 /*
1185 * Add dirpath to export mount point.
1186 */
1187 dirp = add_expdir(&dirhead, cp, len);
1188 dirplen = len;
1189 } else {
1190 getexp_err(ep, tgrp);
1191 goto nextline;
1192 }
1193 *endcp = savedc;
1194 } else {
1195 savedc = *endcp;
1196 *endcp = '\0';
1197 got_nondir = 1;
1198 if (ep == NULL) {
1199 getexp_err(ep, tgrp);
1200 goto nextline;
1201 }
1202
1203 /*
1204 * Get the host or netgroup.
1205 */
1206 setnetgrent(cp);
1207 netgrp = getnetgrent(&hst, &usr, &dom);
1208 do {
1209 if (has_host) {
1210 grp->gr_next = get_grp();
1211 grp = grp->gr_next;
1212 }
1213 if (netgrp) {
1214 if (hst == NULL) {
1215 syslog(LOG_ERR,
1216 "null hostname in netgroup %s, skipping", cp);
1217 grp->gr_type = GT_IGNORE;
1218 } else if (get_host(hst, grp, tgrp)) {
1219 syslog(LOG_ERR,
1220 "bad host %s in netgroup %s, skipping", hst, cp);
1221 grp->gr_type = GT_IGNORE;
1222 }
1223 } else if (get_host(cp, grp, tgrp)) {
1224 syslog(LOG_ERR, "bad host %s, skipping", cp);
1225 grp->gr_type = GT_IGNORE;
1226 }
1227 has_host = TRUE;
1228 } while (netgrp && getnetgrent(&hst, &usr, &dom));
1229 endnetgrent();
1230 *endcp = savedc;
1231 }
1232 cp = endcp;
1233 nextfield(&cp, &endcp);
1234 len = endcp - cp;
1235 }
1236 if (check_options(dirhead)) {
1237 getexp_err(ep, tgrp);
1238 goto nextline;
1239 }
1240 if (!has_host) {
1241 grp->gr_type = GT_DEFAULT;
1242 if (debug)
1243 warnx("adding a default entry");
1244
1245 /*
1246 * Don't allow a network export coincide with a list of
1247 * host(s) on the same line.
1248 */
1249 } else if ((opt_flags & OP_NET) && tgrp->gr_next) {
1250 syslog(LOG_ERR, "network/host conflict");
1251 getexp_err(ep, tgrp);
1252 goto nextline;
1253
1254 /*
1255 * If an export list was specified on this line, make sure
1256 * that we have at least one valid entry, otherwise skip it.
1257 */
1258 } else {
1259 grp = tgrp;
1260 while (grp && grp->gr_type == GT_IGNORE)
1261 grp = grp->gr_next;
1262 if (! grp) {
1263 getexp_err(ep, tgrp);
1264 goto nextline;
1265 }
1266 }
1267
1268 /*
1269 * Loop through hosts, pushing the exports into the kernel.
1270 * After loop, tgrp points to the start of the list and
1271 * grp points to the last entry in the list.
1272 */
1273 grp = tgrp;
1274 do {
1275 if (do_mount(ep, grp, exflags, &anon, dirp, dirplen,
1276 &fsb)) {
1277 getexp_err(ep, tgrp);
1278 goto nextline;
1279 }
1280 } while (grp->gr_next && (grp = grp->gr_next));
1281
1282 /*
1283 * Success. Update the data structures.
1284 */
1285 if (has_host) {
1286 hang_dirp(dirhead, tgrp, ep, opt_flags);
1287 grp->gr_next = grphead;
1288 grphead = tgrp;
1289 } else {
1290 hang_dirp(dirhead, NULL, ep,
1291 opt_flags);
1292 free_grp(grp);
1293 }
1294 dirhead = NULL;
1295 if ((ep->ex_flag & EX_LINKED) == 0) {
1296 ep2 = exphead;
1297 epp = &exphead;
1298
1299 /*
1300 * Insert in the list in alphabetical order.
1301 */
1302 while (ep2 && strcmp(ep2->ex_fsdir, ep->ex_fsdir) < 0) {
1303 epp = &ep2->ex_next;
1304 ep2 = ep2->ex_next;
1305 }
1306 if (ep2)
1307 ep->ex_next = ep2;
1308 *epp = ep;
1309 ep->ex_flag |= EX_LINKED;
1310 }
1311 nextline:
1312 if (dirhead) {
1313 free_dir(dirhead);
1314 dirhead = NULL;
1315 }
1316 }
1317 fclose(exp_file);
1318 }
1319
1320 /*
1321 * Get the export list from all specified files
1322 */
1323 void
1324 get_exportlist(void)
1325 {
1326 struct exportlist *ep, *ep2;
1327 struct grouplist *grp, *tgrp;
1328 struct statfs *fsp, *mntbufp;
1329 struct vfsconf vfc;
1330 char *dirp;
1331 int num, i;
1332 int done;
1333
1334 dirp = NULL;
1335
1336 /*
1337 * First, get rid of the old list
1338 */
1339 ep = exphead;
1340 while (ep) {
1341 ep2 = ep;
1342 ep = ep->ex_next;
1343 free_exp(ep2);
1344 }
1345 exphead = NULL;
1346
1347 grp = grphead;
1348 while (grp) {
1349 tgrp = grp;
1350 grp = grp->gr_next;
1351 free_grp(tgrp);
1352 }
1353 grphead = NULL;
1354
1355 /*
1356 * And delete exports that are in the kernel for all local
1357 * filesystems.
1358 * XXX: Should know how to handle all local exportable filesystems.
1359 */
1360 num = getmntinfo(&mntbufp, MNT_NOWAIT);
1361 for (i = 0; i < num; i++) {
1362 union {
1363 struct ufs_args ua;
1364 struct iso_args ia;
1365 struct mfs_args ma;
1366 struct msdosfs_args da;
1367 struct ntfs_args na;
1368 } targs;
1369 struct export_args export;
1370
1371 fsp = &mntbufp[i];
1372 if (getvfsbyname(fsp->f_fstypename, &vfc) != 0) {
1373 syslog(LOG_ERR, "getvfsbyname() failed for %s",
1374 fsp->f_fstypename);
1375 continue;
1376 }
1377
1378 /*
1379 * Do not delete export for network filesystem by
1380 * passing "export" arg to mount().
1381 * It only makes sense to do this for local filesystems.
1382 */
1383 if (vfc.vfc_flags & VFCF_NETWORK)
1384 continue;
1385
1386 export.ex_flags = MNT_DELEXPORT;
1387 if (mountctl(fsp->f_mntonname, MOUNTCTL_SET_EXPORT, -1,
1388 &export, sizeof(export), NULL, 0) == 0) {
1389 } else if (!strcmp(fsp->f_fstypename, "mfs") ||
1390 !strcmp(fsp->f_fstypename, "ufs") ||
1391 !strcmp(fsp->f_fstypename, "msdos") ||
1392 !strcmp(fsp->f_fstypename, "ntfs") ||
1393 !strcmp(fsp->f_fstypename, "cd9660")) {
1394 bzero(&targs, sizeof targs);
1395 targs.ua.fspec = NULL;
1396 targs.ua.export.ex_flags = MNT_DELEXPORT;
1397 if (mount(fsp->f_fstypename, fsp->f_mntonname,
1398 fsp->f_flags | MNT_UPDATE,
1399 (caddr_t)&targs) < 0)
1400 syslog(LOG_ERR, "can't delete exports for %s",
1401 fsp->f_mntonname);
1402 }
1403 }
1404
1405 /*
1406 * Read in the exports file and build the list, calling
1407 * nmount() as we go along to push the export rules into the kernel.
1408 */
1409 done = 0;
1410 for (i = 0; exnames[i] != NULL; i++) {
1411 if (debug)
1412 warnx("reading exports from %s", exnames[i]);
1413 if ((exp_file = fopen(exnames[i], "r")) == NULL) {
1414 syslog(LOG_WARNING, "can't open %s", exnames[i]);
1415 continue;
1416 }
1417 get_exportlist_one();
1418 fclose(exp_file);
1419 done++;
1420 }
1421 if (done == 0) {
1422 syslog(LOG_ERR, "can't open any exports file");
1423 exit(2);
1424 }
1425 }
1426
1427 /*
1428 * Allocate an export list element
1429 */
1430 struct exportlist *
1431 get_exp(void)
1432 {
1433 struct exportlist *ep;
1434
1435 ep = (struct exportlist *)malloc(sizeof (struct exportlist));
1436 if (ep == NULL)
1437 out_of_mem();
1438 memset(ep, 0, sizeof(struct exportlist));
1439 return (ep);
1440 }
1441
1442 /*
1443 * Allocate a group list element
1444 */
1445 struct grouplist *
1446 get_grp(void)
1447 {
1448 struct grouplist *gp;
1449
1450 gp = (struct grouplist *)malloc(sizeof (struct grouplist));
1451 if (gp == NULL)
1452 out_of_mem();
1453 memset(gp, 0, sizeof(struct grouplist));
1454 return (gp);
1455 }
1456
1457 /*
1458 * Clean up upon an error in get_exportlist().
1459 */
1460 void
1461 getexp_err(struct exportlist *ep, struct grouplist *grp)
1462 {
1463 struct grouplist *tgrp;
1464
1465 if (!(opt_flags & OP_QUIET))
1466 syslog(LOG_ERR, "bad exports list line %s", line);
1467 if (ep && (ep->ex_flag & EX_LINKED) == 0)
1468 free_exp(ep);
1469 while (grp) {
1470 tgrp = grp;
1471 grp = grp->gr_next;
1472 free_grp(tgrp);
1473 }
1474 }
1475
1476 /*
1477 * Search the export list for a matching fs.
1478 */
1479 struct exportlist *
1480 ex_search(fsid_t *fsid)
1481 {
1482 struct exportlist *ep;
1483
1484 ep = exphead;
1485 while (ep) {
1486 if (ep->ex_fs.val[0] == fsid->val[0] &&
1487 ep->ex_fs.val[1] == fsid->val[1])
1488 return (ep);
1489 ep = ep->ex_next;
1490 }
1491 return (ep);
1492 }
1493
1494 /*
1495 * Add a directory path to the list.
1496 */
1497 char *
1498 add_expdir(struct dirlist **dpp, char *cp, int len)
1499 {
1500 struct dirlist *dp;
1501
1502 dp = (struct dirlist *)malloc(sizeof (struct dirlist) + len);
1503 if (dp == NULL)
1504 out_of_mem();
1505 dp->dp_left = *dpp;
1506 dp->dp_right = NULL;
1507 dp->dp_flag = 0;
1508 dp->dp_hosts = NULL;
1509 strcpy(dp->dp_dirp, cp);
1510 *dpp = dp;
1511 return (dp->dp_dirp);
1512 }
1513
1514 /*
1515 * Hang the dir list element off the dirpath binary tree as required
1516 * and update the entry for host.
1517 */
1518 void
1519 hang_dirp(struct dirlist *dp, struct grouplist *grp, struct exportlist *ep,
1520 int flags)
1521 {
1522 struct hostlist *hp;
1523 struct dirlist *dp2;
1524
1525 if (flags & OP_ALLDIRS) {
1526 if (ep->ex_defdir)
1527 free((caddr_t)dp);
1528 else
1529 ep->ex_defdir = dp;
1530 if (grp == NULL) {
1531 ep->ex_defdir->dp_flag |= DP_DEFSET;
1532 } else while (grp) {
1533 hp = get_ht();
1534 hp->ht_grp = grp;
1535 hp->ht_next = ep->ex_defdir->dp_hosts;
1536 ep->ex_defdir->dp_hosts = hp;
1537 grp = grp->gr_next;
1538 }
1539 } else {
1540
1541 /*
1542 * Loop through the directories adding them to the tree.
1543 */
1544 while (dp) {
1545 dp2 = dp->dp_left;
1546 add_dlist(&ep->ex_dirl, dp, grp, flags);
1547 dp = dp2;
1548 }
1549 }
1550 }
1551
1552 /*
1553 * Traverse the binary tree either updating a node that is already there
1554 * for the new directory or adding the new node.
1555 */
1556 void
1557 add_dlist(struct dirlist **dpp, struct dirlist *newdp, struct grouplist *grp,
1558 int flags)
1559 {
1560 struct dirlist *dp;
1561 struct hostlist *hp;
1562 int cmp;
1563
1564 dp = *dpp;
1565 if (dp) {
1566 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp);
1567 if (cmp > 0) {
1568 add_dlist(&dp->dp_left, newdp, grp, flags);
1569 return;
1570 } else if (cmp < 0) {
1571 add_dlist(&dp->dp_right, newdp, grp, flags);
1572 return;
1573 } else
1574 free((caddr_t)newdp);
1575 } else {
1576 dp = newdp;
1577 dp->dp_left = NULL;
1578 *dpp = dp;
1579 }
1580 if (grp) {
1581
1582 /*
1583 * Hang all of the host(s) off of the directory point.
1584 */
1585 do {
1586 hp = get_ht();
1587 hp->ht_grp = grp;
1588 hp->ht_next = dp->dp_hosts;
1589 dp->dp_hosts = hp;
1590 grp = grp->gr_next;
1591 } while (grp);
1592 } else {
1593 dp->dp_flag |= DP_DEFSET;
1594 }
1595 }
1596
1597 /*
1598 * Search for a dirpath on the export point.
1599 */
1600 struct dirlist *
1601 dirp_search(struct dirlist *dp, char *dirp)
1602 {
1603 int cmp;
1604
1605 if (dp) {
1606 cmp = strcmp(dp->dp_dirp, dirp);
1607 if (cmp > 0)
1608 return (dirp_search(dp->dp_left, dirp));
1609 else if (cmp < 0)
1610 return (dirp_search(dp->dp_right, dirp));
1611 else
1612 return (dp);
1613 }
1614 return (dp);
1615 }
1616
1617 /*
1618 * Scan for a host match in a directory tree.
1619 */
1620 int
1621 chk_host(struct dirlist *dp, struct sockaddr *saddr, int *defsetp,
1622 int *hostsetp)
1623 {
1624 struct hostlist *hp;
1625 struct grouplist *grp;
1626 struct addrinfo *ai;
1627
1628 if (dp) {
1629 if (dp->dp_flag & DP_DEFSET)
1630 *defsetp = dp->dp_flag;
1631 hp = dp->dp_hosts;
1632 while (hp) {
1633 grp = hp->ht_grp;
1634 switch (grp->gr_type) {
1635 case GT_HOST:
1636 ai = grp->gr_ptr.gt_addrinfo;
1637 for (; ai; ai = ai->ai_next) {
1638 if (!sacmp(ai->ai_addr, saddr, NULL)) {
1639 *hostsetp =
1640 (hp->ht_flag | DP_HOSTSET);
1641 return (1);
1642 }
1643 }
1644 break;
1645 case GT_NET:
1646 if (!sacmp(saddr, (struct sockaddr *)
1647 &grp->gr_ptr.gt_net.nt_net,
1648 (struct sockaddr *)
1649 &grp->gr_ptr.gt_net.nt_mask)) {
1650 *hostsetp = (hp->ht_flag | DP_HOSTSET);
1651 return (1);
1652 }
1653 break;
1654 }
1655 hp = hp->ht_next;
1656 }
1657 }
1658 return (0);
1659 }
1660
1661 /*
1662 * Scan tree for a host that matches the address.
1663 */
1664 int
1665 scan_tree(struct dirlist *dp, struct sockaddr *saddr)
1666 {
1667 int defset, hostset;
1668
1669 if (dp) {
1670 if (scan_tree(dp->dp_left, saddr))
1671 return (1);
1672 if (chk_host(dp, saddr, &defset, &hostset))
1673 return (1);
1674 if (scan_tree(dp->dp_right, saddr))
1675 return (1);
1676 }
1677 return (0);
1678 }
1679
1680 /*
1681 * Traverse the dirlist tree and free it up.
1682 */
1683 void
1684 free_dir(struct dirlist *dp)
1685 {
1686
1687 if (dp) {
1688 free_dir(dp->dp_left);
1689 free_dir(dp->dp_right);
1690 free_host(dp->dp_hosts);
1691 free((caddr_t)dp);
1692 }
1693 }
1694
1695 /*
1696 * Parse the option string and update fields.
1697 * Option arguments may either be -<option>=<value> or
1698 * -<option> <value>
1699 */
1700 int
1701 do_opt(char **cpp, char **endcpp, struct exportlist *ep, struct grouplist *grp,
1702 int *has_hostp, int *exflagsp, struct ucred *cr)
1703 {
1704 char *cpoptarg, *cpoptend;
1705 char *cp, *endcp, *cpopt, savedc, savedc2;
1706 int allflag, usedarg;
1707
1708 savedc2 = '\0';
1709 cpopt = *cpp;
1710 cpopt++;
1711 cp = *endcpp;
1712 savedc = *cp;
1713 *cp = '\0';
1714 while (cpopt && *cpopt) {
1715 allflag = 1;
1716 usedarg = -2;
1717 if ((cpoptend = strchr(cpopt, ','))) {
1718 *cpoptend++ = '\0';
1719 if ((cpoptarg = strchr(cpopt, '=')))
1720 *cpoptarg++ = '\0';
1721 } else {
1722 if ((cpoptarg = strchr(cpopt, '=')))
1723 *cpoptarg++ = '\0';
1724 else {
1725 *cp = savedc;
1726 nextfield(&cp, &endcp);
1727 **endcpp = '\0';
1728 if (endcp > cp && *cp != '-') {
1729 cpoptarg = cp;
1730 savedc2 = *endcp;
1731 *endcp = '\0';
1732 usedarg = 0;
1733 }
1734 }
1735 }
1736 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) {
1737 *exflagsp |= MNT_EXRDONLY;
1738 } else if (cpoptarg && (!strcmp(cpopt, "maproot") ||
1739 !(allflag = strcmp(cpopt, "mapall")) ||
1740 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) {
1741 usedarg++;
1742 parsecred(cpoptarg, cr);
1743 if (allflag == 0) {
1744 *exflagsp |= MNT_EXPORTANON;
1745 opt_flags |= OP_MAPALL;
1746 } else
1747 opt_flags |= OP_MAPROOT;
1748 } else if (cpoptarg && (!strcmp(cpopt, "mask") ||
1749 !strcmp(cpopt, "m"))) {
1750 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) {
1751 syslog(LOG_ERR, "bad mask: %s", cpoptarg);
1752 return (1);
1753 }
1754 usedarg++;
1755 opt_flags |= OP_MASK;
1756 } else if (cpoptarg && (!strcmp(cpopt, "network") ||
1757 !strcmp(cpopt, "n"))) {
1758 if (strchr(cpoptarg, '/') != NULL) {
1759 if (debug)
1760 fprintf(stderr, "setting OP_MASKLEN\n");
1761 opt_flags |= OP_MASKLEN;
1762 }
1763 if (grp->gr_type != GT_NULL) {
1764 syslog(LOG_ERR, "network/host conflict");
1765 return (1);
1766 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) {
1767 syslog(LOG_ERR, "bad net: %s", cpoptarg);
1768 return (1);
1769 }
1770 grp->gr_type = GT_NET;
1771 *has_hostp = 1;
1772 usedarg++;
1773 opt_flags |= OP_NET;
1774 } else if (!strcmp(cpopt, "alldirs")) {
1775 opt_flags |= OP_ALLDIRS;
1776 } else if (!strcmp(cpopt, "public")) {
1777 *exflagsp |= MNT_EXPUBLIC;
1778 } else if (!strcmp(cpopt, "webnfs")) {
1779 *exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON);
1780 opt_flags |= OP_MAPALL;
1781 } else if (cpoptarg && !strcmp(cpopt, "index")) {
1782 ep->ex_indexfile = strdup(cpoptarg);
1783 } else if (!strcmp(cpopt, "quiet")) {
1784 opt_flags |= OP_QUIET;
1785 } else {
1786 syslog(LOG_ERR, "bad opt %s", cpopt);
1787 return (1);
1788 }
1789 if (usedarg >= 0) {
1790 *endcp = savedc2;
1791 **endcpp = savedc;
1792 if (usedarg > 0) {
1793 *cpp = cp;
1794 *endcpp = endcp;
1795 }
1796 return (0);
1797 }
1798 cpopt = cpoptend;
1799 }
1800 **endcpp = savedc;
1801 return (0);
1802 }
1803
1804 /*
1805 * Translate a character string to the corresponding list of network
1806 * addresses for a hostname.
1807 */
1808 int
1809 get_host(char *cp, struct grouplist *grp, struct grouplist *tgrp)
1810 {
1811 struct grouplist *checkgrp;
1812 struct addrinfo *ai, *tai, hints;
1813 int ecode;
1814 char host[NI_MAXHOST];
1815
1816 if (grp->gr_type != GT_NULL) {
1817 syslog(LOG_ERR, "Bad netgroup type for ip host %s", cp);
1818 return (1);
1819 }
1820 memset(&hints, 0, sizeof hints);
1821 hints.ai_flags = AI_CANONNAME;
1822 hints.ai_protocol = IPPROTO_UDP;
1823 ecode = getaddrinfo(cp, NULL, &hints, &ai);
1824 if (ecode != 0) {
1825 syslog(LOG_ERR,"can't get address info for host %s", cp);
1826 return 1;
1827 }
1828 grp->gr_ptr.gt_addrinfo = ai;
1829 while (ai != NULL) {
1830 if (ai->ai_canonname == NULL) {
1831 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, host,
1832 sizeof host, NULL, 0, NI_NUMERICHOST) != 0)
1833 strlcpy(host, "?", sizeof(host));
1834 ai->ai_canonname = strdup(host);
1835 ai->ai_flags |= AI_CANONNAME;
1836 }
1837 if (debug)
1838 fprintf(stderr, "got host %s\n", ai->ai_canonname);
1839 /*
1840 * Sanity check: make sure we don't already have an entry
1841 * for this host in the grouplist.
1842 */
1843 for (checkgrp = tgrp; checkgrp != NULL;
1844 checkgrp = checkgrp->gr_next) {
1845 if (checkgrp->gr_type != GT_HOST)
1846 continue;
1847 for (tai = checkgrp->gr_ptr.gt_addrinfo; tai != NULL;
1848 tai = tai->ai_next) {
1849 if (sacmp(tai->ai_addr, ai->ai_addr, NULL) != 0)
1850 continue;
1851 if (debug)
1852 fprintf(stderr,
1853 "ignoring duplicate host %s\n",
1854 ai->ai_canonname);
1855 grp->gr_type = GT_IGNORE;
1856 return (0);
1857 }
1858 }
1859 ai = ai->ai_next;
1860 }
1861 grp->gr_type = GT_HOST;
1862 return (0);
1863 }
1864
1865 /*
1866 * Free up an exports list component
1867 */
1868 void
1869 free_exp(struct exportlist *ep)
1870 {
1871
1872 if (ep->ex_defdir) {
1873 free_host(ep->ex_defdir->dp_hosts);
1874 free((caddr_t)ep->ex_defdir);
1875 }
1876 if (ep->ex_fsdir)
1877 free(ep->ex_fsdir);
1878 if (ep->ex_indexfile)
1879 free(ep->ex_indexfile);
1880 free_dir(ep->ex_dirl);
1881 free((caddr_t)ep);
1882 }
1883
1884 /*
1885 * Free hosts.
1886 */
1887 void
1888 free_host(struct hostlist *hp)
1889 {
1890 struct hostlist *hp2;
1891
1892 while (hp) {
1893 hp2 = hp;
1894 hp = hp->ht_next;
1895 free((caddr_t)hp2);
1896 }
1897 }
1898
1899 struct hostlist *
1900 get_ht(void)
1901 {
1902 struct hostlist *hp;
1903
1904 hp = (struct hostlist *)malloc(sizeof (struct hostlist));
1905 if (hp == NULL)
1906 out_of_mem();
1907 hp->ht_next = NULL;
1908 hp->ht_flag = 0;
1909 return (hp);
1910 }
1911
1912 /*
1913 * Out of memory, fatal
1914 */
1915 void
1916 out_of_mem(void)
1917 {
1918
1919 syslog(LOG_ERR, "out of memory");
1920 exit(2);
1921 }
1922
1923 /*
1924 * Do the mount syscall with the update flag to push the export info into
1925 * the kernel.
1926 */
1927 int
1928 do_mount(struct exportlist *ep, struct grouplist *grp, int exflags,
1929 struct ucred *anoncrp, char *dirp, int dirplen, struct statfs *fsb)
1930 {
1931 struct statfs fsb1;
1932 struct addrinfo *ai;
1933 struct export_args *eap;
1934 char *cp = NULL;
1935 int done;
1936 char savedc = '\0';
1937 union {
1938 struct ufs_args ua;
1939 struct iso_args ia;
1940 struct mfs_args ma;
1941 struct msdosfs_args da;
1942 struct ntfs_args na;
1943 } args;
1944
1945 bzero(&args, sizeof args);
1946 /* XXX, we assume that all xx_args look like ufs_args. */
1947 args.ua.fspec = 0;
1948 eap = &args.ua.export;
1949
1950 eap->ex_flags = exflags;
1951 eap->ex_anon = *anoncrp;
1952 eap->ex_indexfile = ep->ex_indexfile;
1953 if (grp->gr_type == GT_HOST)
1954 ai = grp->gr_ptr.gt_addrinfo;
1955 else
1956 ai = NULL;
1957 done = FALSE;
1958 while (!done) {
1959 switch (grp->gr_type) {
1960 case GT_HOST:
1961 if (ai->ai_addr->sa_family == AF_INET6 && have_v6 == 0)
1962 goto skip;
1963 eap->ex_addr = ai->ai_addr;
1964 eap->ex_addrlen = ai->ai_addrlen;
1965 eap->ex_masklen = 0;
1966 break;
1967 case GT_NET:
1968 if (grp->gr_ptr.gt_net.nt_net.ss_family == AF_INET6 &&
1969 have_v6 == 0)
1970 goto skip;
1971 eap->ex_addr =
1972 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_net;
1973 eap->ex_addrlen = args.ua.export.ex_addr->sa_len;
1974 eap->ex_mask =
1975 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask;
1976 eap->ex_masklen = args.ua.export.ex_mask->sa_len;
1977 break;
1978 case GT_DEFAULT:
1979 eap->ex_addr = NULL;
1980 eap->ex_addrlen = 0;
1981 eap->ex_mask = NULL;
1982 eap->ex_masklen = 0;
1983 break;
1984 case GT_IGNORE:
1985 return(0);
1986 break;
1987 default:
1988 syslog(LOG_ERR, "bad grouptype");
1989 if (cp)
1990 *cp = savedc;
1991 return (1);
1992 }
1993
1994 /*
1995 * XXX:
1996 * Maybe I should just use the fsb->f_mntonname path instead
1997 * of looping back up the dirp to the mount point??
1998 * Also, needs to know how to export all types of local
1999 * exportable filesystems and not just "ufs".
2000 */
2001 for (;;) {
2002 int r;
2003
2004 r = mountctl(fsb->f_mntonname, MOUNTCTL_SET_EXPORT,
2005 -1,
2006 &args.ua.export, sizeof(args.ua.export),
2007 NULL, 0);
2008 if (r < 0 && errno == EOPNOTSUPP) {
2009 r = mount(fsb->f_fstypename, dirp,
2010 fsb->f_flags | MNT_UPDATE,
2011 (caddr_t)&args);
2012 }
2013 if (r >= 0)
2014 break;
2015 if (cp)
2016 *cp-- = savedc;
2017 else
2018 cp = dirp + dirplen - 1;
2019 if (opt_flags & OP_QUIET)
2020 return (1);
2021 if (errno == EPERM) {
2022 if (debug)
2023 warnx("can't change attributes for %s",
2024 dirp);
2025 syslog(LOG_ERR,
2026 "can't change attributes for %s", dirp);
2027 return (1);
2028 }
2029 if (opt_flags & OP_ALLDIRS) {
2030 if (errno == EINVAL)
2031 syslog(LOG_ERR,
2032 "-alldirs requested but %s is not a filesystem mountpoint",
2033 dirp);
2034 else
2035 syslog(LOG_ERR,
2036 "could not remount %s: %m",
2037 dirp);
2038 return (1);
2039 }
2040 /* back up over the last component */
2041 while (*cp == '/' && cp > dirp)
2042 cp--;
2043 while (*(cp - 1) != '/' && cp > dirp)
2044 cp--;
2045 if (cp == dirp) {
2046 if (debug)
2047 warnx("mnt unsucc");
2048 syslog(LOG_ERR, "can't export %s", dirp);
2049 return (1);
2050 }
2051 savedc = *cp;
2052 *cp = '\0';
2053 /* Check that we're still on the same filesystem. */
2054 if (statfs(dirp, &fsb1) != 0 || bcmp(&fsb1.f_fsid,
2055 &fsb->f_fsid, sizeof(fsb1.f_fsid)) != 0) {
2056 *cp = savedc;
2057 syslog(LOG_ERR, "can't export %s", dirp);
2058 return (1);
2059 }
2060 }
2061 skip:
2062 if (ai != NULL)
2063 ai = ai->ai_next;
2064 if (ai == NULL)
2065 done = TRUE;
2066 }
2067 if (cp)
2068 *cp = savedc;
2069 return (0);
2070 }
2071
2072 /*
2073 * Translate a net address.
2074 *
2075 * If `maskflg' is nonzero, then `cp' is a netmask, not a network address.
2076 */
2077 int
2078 get_net(char *cp, struct netmsk *net, int maskflg)
2079 {
2080 struct netent *np = NULL;
2081 char *name, *p, *prefp;
2082 struct sockaddr_in sin;
2083 struct sockaddr *sa = NULL;
2084 struct addrinfo hints, *ai = NULL;
2085 char netname[NI_MAXHOST];
2086 long preflen;
2087
2088 p = prefp = NULL;
2089 if ((opt_flags & OP_MASKLEN) && !maskflg) {
2090 p = strchr(cp, '/');
2091 *p = '\0';
2092 prefp = p + 1;
2093 }
2094
2095 /*
2096 * Check for a numeric address first. We wish to avoid
2097 * possible DNS lookups in getnetbyname().
2098 */
2099 if (isxdigit(*cp) || *cp == ':') {
2100 memset(&hints, 0, sizeof hints);
2101 /* Ensure the mask and the network have the same family. */
2102 if (maskflg && (opt_flags & OP_NET))
2103 hints.ai_family = net->nt_net.ss_family;
2104 else if (!maskflg && (opt_flags & OP_HAVEMASK))
2105 hints.ai_family = net->nt_mask.ss_family;
2106 else
2107 hints.ai_family = AF_UNSPEC;
2108 hints.ai_flags = AI_NUMERICHOST;
2109 if (getaddrinfo(cp, NULL, &hints, &ai) == 0)
2110 sa = ai->ai_addr;
2111 if (sa != NULL && ai->ai_family == AF_INET) {
2112 /*
2113 * The address in `cp' is really a network address, so
2114 * use inet_network() to re-interpret this correctly.
2115 * e.g. "127.1" means 127.1.0.0, not 127.0.0.1.
2116 */
2117 bzero(&sin, sizeof sin);
2118 sin.sin_family = AF_INET;
2119 sin.sin_len = sizeof sin;
2120 sin.sin_addr = inet_makeaddr(inet_network(cp), 0);
2121 if (debug)
2122 fprintf(stderr, "get_net: v4 addr %s\n",
2123 inet_ntoa(sin.sin_addr));
2124 sa = (struct sockaddr *)&sin;
2125 }
2126 }
2127 if (sa == NULL && (np = getnetbyname(cp)) != NULL) {
2128 bzero(&sin, sizeof sin);
2129 sin.sin_family = AF_INET;
2130 sin.sin_len = sizeof sin;
2131 sin.sin_addr = inet_makeaddr(np->n_net, 0);
2132 sa = (struct sockaddr *)&sin;
2133 }
2134 if (sa == NULL)
2135 goto fail;
2136
2137 if (maskflg) {
2138 /* The specified sockaddr is a mask. */
2139 if (checkmask(sa) != 0)
2140 goto fail;
2141 bcopy(sa, &net->nt_mask, sa->sa_len);
2142 opt_flags |= OP_HAVEMASK;
2143 } else {
2144 /* The specified sockaddr is a network address. */
2145 bcopy(sa, &net->nt_net, sa->sa_len);
2146
2147 /* Get a network name for the export list. */
2148 if (np) {
2149 name = np->n_name;
2150 } else if (getnameinfo(sa, sa->sa_len, netname, sizeof netname,
2151 NULL, 0, NI_NUMERICHOST) == 0) {
2152 name = netname;
2153 } else {
2154 goto fail;
2155 }
2156 if ((net->nt_name = strdup(name)) == NULL)
2157 out_of_mem();
2158
2159 /*
2160 * Extract a mask from either a "/<masklen>" suffix, or
2161 * from the class of an IPv4 address.
2162 */
2163 if (opt_flags & OP_MASKLEN) {
2164 preflen = strtol(prefp, NULL, 10);
2165 if (preflen < 0L || preflen == LONG_MAX)
2166 goto fail;
2167 bcopy(sa, &net->nt_mask, sa->sa_len);
2168 if (makemask(&net->nt_mask, (int)preflen) != 0)
2169 goto fail;
2170 opt_flags |= OP_HAVEMASK;
2171 *p = '/';
2172 } else if (sa->sa_family == AF_INET &&
2173 (opt_flags & OP_MASK) == 0) {
2174 in_addr_t addr;
2175
2176 addr = ((struct sockaddr_in *)sa)->sin_addr.s_addr;
2177 if (IN_CLASSA(addr))
2178 preflen = 8;
2179 else if (IN_CLASSB(addr))
2180 preflen = 16;
2181 else if (IN_CLASSC(addr))
2182 preflen = 24;
2183 else if (IN_CLASSD(addr))
2184 preflen = 28;
2185 else
2186 preflen = 32; /* XXX */
2187
2188 bcopy(sa, &net->nt_mask, sa->sa_len);
2189 makemask(&net->nt_mask, (int)preflen);
2190 opt_flags |= OP_HAVEMASK;
2191 }
2192 }
2193
2194 if (ai)
2195 freeaddrinfo(ai);
2196 return 0;
2197
2198 fail:
2199 if (ai)
2200 freeaddrinfo(ai);
2201 return 1;
2202 }
2203
2204 /*
2205 * Parse out the next white space separated field
2206 */
2207 void
2208 nextfield(char **cp, char **endcp)
2209 {
2210 char *p;
2211
2212 p = *cp;
2213 while (*p == ' ' || *p == '\t')
2214 p++;
2215 if (*p == '\n' || *p == '\0')
2216 *cp = *endcp = p;
2217 else {
2218 *cp = p++;
2219 while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0')
2220 p++;
2221 *endcp = p;
2222 }
2223 }
2224
2225 /*
2226 * Get an exports file line. Skip over blank lines and handle line
2227 * continuations.
2228 */
2229 int
2230 get_line(void)
2231 {
2232 char *p, *cp;
2233 size_t len;
2234 int totlen, cont_line;
2235
2236 /*
2237 * Loop around ignoring blank lines and getting all continuation lines.
2238 */
2239 p = line;
2240 totlen = 0;
2241 do {
2242 if ((p = fgetln(exp_file, &len)) == NULL)
2243 return (0);
2244 cp = p + len - 1;
2245 cont_line = 0;
2246 while (cp >= p &&
2247 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) {
2248 if (*cp == '\\')
2249 cont_line = 1;
2250 cp--;
2251 len--;
2252 }
2253 if (cont_line) {
2254 *++cp = ' ';
2255 len++;
2256 }
2257 if (linesize < len + totlen + 1) {
2258 linesize = len + totlen + 1;
2259 line = realloc(line, linesize);
2260 if (line == NULL)
2261 out_of_mem();
2262 }
2263 memcpy(line + totlen, p, len);
2264 totlen += len;
2265 line[totlen] = '\0';
2266 } while (totlen == 0 || cont_line);
2267 return (1);
2268 }
2269
2270 /*
2271 * Parse a description of a credential.
2272 */
2273 void
2274 parsecred(char *namelist, struct ucred *cr)
2275 {
2276 char *name;
2277 int cnt;
2278 char *names;
2279 struct passwd *pw;
2280 struct group *gr;
2281 gid_t ngroups, groups[NGROUPS + 1];
2282
2283 /*
2284 * Set up the unprivileged user.
2285 */
2286 cr->cr_ref = 1;
2287 cr->cr_uid = -2;
2288 cr->cr_groups[0] = -2;
2289 cr->cr_ngroups = 1;
2290 /*
2291 * Get the user's password table entry.
2292 */
2293 names = strsep(&namelist, " \t\n");
2294 name = strsep(&names, ":");
2295 if (isdigit(*name) || *name == '-')
2296 pw = getpwuid(atoi(name));
2297 else
2298 pw = getpwnam(name);
2299 /*
2300 * Credentials specified as those of a user.
2301 */
2302 if (names == NULL) {
2303 if (pw == NULL) {
2304 syslog(LOG_ERR, "unknown user: %s", name);
2305 return;
2306 }
2307 cr->cr_uid = pw->pw_uid;
2308 ngroups = NGROUPS + 1;
2309 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups))
2310 syslog(LOG_ERR, "too many groups");
2311 /*
2312 * Compress out duplicate
2313 */
2314 cr->cr_ngroups = ngroups - 1;
2315 cr->cr_groups[0] = groups[0];
2316 for (cnt = 2; cnt < ngroups; cnt++)
2317 cr->cr_groups[cnt - 1] = groups[cnt];
2318 return;
2319 }
2320 /*
2321 * Explicit credential specified as a colon separated list:
2322 * uid:gid:gid:...
2323 */
2324 if (pw != NULL)
2325 cr->cr_uid = pw->pw_uid;
2326 else if (isdigit(*name) || *name == '-')
2327 cr->cr_uid = atoi(name);
2328 else {
2329 syslog(LOG_ERR, "unknown user: %s", name);
2330 return;
2331 }
2332 cr->cr_ngroups = 0;
2333 while (names != NULL && *names != '\0' && cr->cr_ngroups < NGROUPS) {
2334 name = strsep(&names, ":");
2335 if (isdigit(*name) || *name == '-') {
2336 cr->cr_groups[cr->cr_ngroups++] = atoi(name);
2337 } else {
2338 if ((gr = getgrnam(name)) == NULL) {
2339 syslog(LOG_ERR, "unknown group: %s", name);
2340 continue;
2341 }
2342 cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid;
2343 }
2344 }
2345 if (names != NULL && *names != '\0' && cr->cr_ngroups == NGROUPS)
2346 syslog(LOG_ERR, "too many groups");
2347 }
2348
2349 #define STRSIZ (RPCMNT_NAMELEN+RPCMNT_PATHLEN+50)
2350 /*
2351 * Routines that maintain the remote mounttab
2352 */
2353 void
2354 get_mountlist(void)
2355 {
2356 struct mountlist *mlp, **mlpp;
2357 char *host, *dirp, *cp;
2358 char str[STRSIZ];
2359 FILE *mlfile;
2360
2361 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) {
2362 if (errno == ENOENT)
2363 return;
2364 else {
2365 syslog(LOG_ERR, "can't open %s", _PATH_RMOUNTLIST);
2366 return;
2367 }
2368 }
2369 mlpp = &mlhead;
2370 while (fgets(str, STRSIZ, mlfile) != NULL) {
2371 cp = str;
2372 host = strsep(&cp, " \t\n");
2373 dirp = strsep(&cp, " \t\n");
2374 if (host == NULL || dirp == NULL)
2375 continue;
2376 mlp = (struct mountlist *)malloc(sizeof (*mlp));
2377 if (mlp == NULL)
2378 out_of_mem();
2379 strncpy(mlp->ml_host, host, RPCMNT_NAMELEN);
2380 mlp->ml_host[RPCMNT_NAMELEN] = '\0';
2381 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN);
2382 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0';
2383 mlp->ml_next = NULL;
2384 *mlpp = mlp;
2385 mlpp = &mlp->ml_next;
2386 }
2387 fclose(mlfile);
2388 }
2389
2390 void
2391 del_mlist(char *hostp, char *dirp)
2392 {
2393 struct mountlist *mlp, **mlpp;
2394 struct mountlist *mlp2;
2395 FILE *mlfile;
2396 int fnd = 0;
2397
2398 mlpp = &mlhead;
2399 mlp = mlhead;
2400 while (mlp) {
2401 if (!strcmp(mlp->ml_host, hostp) &&
2402 (!dirp || !strcmp(mlp->ml_dirp, dirp))) {
2403 fnd = 1;
2404 mlp2 = mlp;
2405 *mlpp = mlp = mlp->ml_next;
2406 free((caddr_t)mlp2);
2407 } else {
2408 mlpp = &mlp->ml_next;
2409 mlp = mlp->ml_next;
2410 }
2411 }
2412 if (fnd) {
2413 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) {
2414 syslog(LOG_ERR,"can't update %s", _PATH_RMOUNTLIST);
2415 return;
2416 }
2417 mlp = mlhead;
2418 while (mlp) {
2419 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
2420 mlp = mlp->ml_next;
2421 }
2422 fclose(mlfile);
2423 }
2424 }
2425
2426 void
2427 add_mlist(char *hostp, char *dirp)
2428 {
2429 struct mountlist *mlp, **mlpp;
2430 FILE *mlfile;
2431
2432 mlpp = &mlhead;
2433 mlp = mlhead;
2434 while (mlp) {
2435 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp))
2436 return;
2437 mlpp = &mlp->ml_next;
2438 mlp = mlp->ml_next;
2439 }
2440 mlp = (struct mountlist *)malloc(sizeof (*mlp));
2441 if (mlp == NULL)
2442 out_of_mem();
2443 strncpy(mlp->ml_host, hostp, RPCMNT_NAMELEN);
2444 mlp->ml_host[RPCMNT_NAMELEN] = '\0';
2445 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN);
2446 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0';
2447 mlp->ml_next = NULL;
2448 *mlpp = mlp;
2449 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) {
2450 syslog(LOG_ERR, "can't update %s", _PATH_RMOUNTLIST);
2451 return;
2452 }
2453 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
2454 fclose(mlfile);
2455 }
2456
2457 /*
2458 * Free up a group list.
2459 */
2460 void
2461 free_grp(struct grouplist *grp)
2462 {
2463 if (grp->gr_type == GT_HOST) {
2464 if (grp->gr_ptr.gt_addrinfo != NULL)
2465 freeaddrinfo(grp->gr_ptr.gt_addrinfo);
2466 } else if (grp->gr_type == GT_NET) {
2467 if (grp->gr_ptr.gt_net.nt_name)
2468 free(grp->gr_ptr.gt_net.nt_name);
2469 }
2470 free((caddr_t)grp);
2471 }
2472
2473 #ifdef DEBUG
2474 void
2475 SYSLOG(int pri, const char *fmt, ...)
2476 {
2477 va_list ap;
2478
2479 va_start(ap, fmt);
2480 vfprintf(stderr, fmt, ap);
2481 va_end(ap);
2482 }
2483 #endif /* DEBUG */
2484
2485 /*
2486 * Check options for consistency.
2487 */
2488 int
2489 check_options(struct dirlist *dp)
2490 {
2491
2492 if (dp == NULL)
2493 return (1);
2494 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL)) {
2495 syslog(LOG_ERR, "-mapall and -maproot mutually exclusive");
2496 return (1);
2497 }
2498 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) {
2499 syslog(LOG_ERR, "-mask requires -network");
2500 return (1);
2501 }
2502 if ((opt_flags & OP_NET) && (opt_flags & OP_HAVEMASK) == 0) {
2503 syslog(LOG_ERR, "-network requires mask specification");
2504 return (1);
2505 }
2506 if ((opt_flags & OP_MASK) && (opt_flags & OP_MASKLEN)) {
2507 syslog(LOG_ERR, "-mask and /masklen are mutually exclusive");
2508 return (1);
2509 }
2510 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) {
2511 syslog(LOG_ERR, "-alldirs has multiple directories");
2512 return (1);
2513 }
2514 return (0);
2515 }
2516
2517 /*
2518 * Check an absolute directory path for any symbolic links. Return true
2519 */
2520 int
2521 check_dirpath(char *dirp)
2522 {
2523 char *cp;
2524 int ret = 1;
2525 struct stat sb;
2526
2527 cp = dirp + 1;
2528 while (*cp && ret) {
2529 if (*cp == '/') {
2530 *cp = '\0';
2531 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode))
2532 ret = 0;
2533 *cp = '/';
2534 }
2535 cp++;
2536 }
2537 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode))
2538 ret = 0;
2539 return (ret);
2540 }
2541
2542 /*
2543 * Make a netmask according to the specified prefix length. The ss_family
2544 * and other non-address fields must be initialised before calling this.
2545 */
2546 int
2547 makemask(struct sockaddr_storage *ssp, int bitlen)
2548 {
2549 u_char *p;
2550 int bits, i, len;
2551
2552 if ((p = sa_rawaddr((struct sockaddr *)ssp, &len)) == NULL)
2553 return (-1);
2554 if (bitlen > len * CHAR_BIT)
2555 return (-1);
2556 for (i = 0; i < len; i++) {
2557 bits = (bitlen > CHAR_BIT) ? CHAR_BIT : bitlen;
2558 *p++ = (1 << bits) - 1;
2559 bitlen -= bits;
2560 }
2561 return 0;
2562 }
2563
2564 /*
2565 * Check that the sockaddr is a valid netmask. Returns 0 if the mask
2566 * is acceptable (i.e. of the form 1...10....0).
2567 */
2568 int
2569 checkmask(struct sockaddr *sa)
2570 {
2571 u_char *mask;
2572 int i, len;
2573
2574 if ((mask = sa_rawaddr(sa, &len)) == NULL)
2575 return (-1);
2576
2577 for (i = 0; i < len; i++)
2578 if (mask[i] != 0xff)
2579 break;
2580 if (i < len) {
2581 if (~mask[i] & (u_char)(~mask[i] + 1))
2582 return (-1);
2583 i++;
2584 }
2585 for (; i < len; i++)
2586 if (mask[i] != 0)
2587 return (-1);
2588 return (0);
2589 }
2590
2591 /*
2592 * Compare two sockaddrs according to a specified mask. Return zero if
2593 * `sa1' matches `sa2' when filtered by the netmask in `samask'.
2594 * If samask is NULL, perform a full comparision.
2595 */
2596 int
2597 sacmp(struct sockaddr *sa1, struct sockaddr *sa2, struct sockaddr *samask)
2598 {
2599 unsigned char *p1, *p2, *mask;
2600 int len, i;
2601
2602 if (sa1->sa_family != sa2->sa_family ||
2603 (p1 = sa_rawaddr(sa1, &len)) == NULL ||
2604 (p2 = sa_rawaddr(sa2, NULL)) == NULL)
2605 return (1);
2606
2607 switch (sa1->sa_family) {
2608 case AF_INET6:
2609 if (((struct sockaddr_in6 *)sa1)->sin6_scope_id !=
2610 ((struct sockaddr_in6 *)sa2)->sin6_scope_id)
2611 return (1);
2612 break;
2613 }
2614
2615 /* Simple binary comparison if no mask specified. */
2616 if (samask == NULL)
2617 return (memcmp(p1, p2, len));
2618
2619 /* Set up the mask, and do a mask-based comparison. */
2620 if (sa1->sa_family != samask->sa_family ||
2621 (mask = sa_rawaddr(samask, NULL)) == NULL)
2622 return (1);
2623
2624 for (i = 0; i < len; i++)
2625 if ((p1[i] & mask[i]) != (p2[i] & mask[i]))
2626 return (1);
2627 return (0);
2628 }
2629
2630 /*
2631 * Return a pointer to the part of the sockaddr that contains the
2632 * raw address, and set *nbytes to its length in bytes. Returns
2633 * NULL if the address family is unknown.
2634 */
2635 void *
2636 sa_rawaddr(struct sockaddr *sa, int *nbytes) {
2637 void *p;
2638 int len;
2639
2640 switch (sa->sa_family) {
2641 case AF_INET:
2642 len = sizeof(((struct sockaddr_in *)sa)->sin_addr);
2643 p = &((struct sockaddr_in *)sa)->sin_addr;
2644 break;
2645 case AF_INET6:
2646 len = sizeof(((struct sockaddr_in6 *)sa)->sin6_addr);
2647 p = &((struct sockaddr_in6 *)sa)->sin6_addr;
2648 break;
2649 default:
2650 p = NULL;
2651 len = 0;
2652 }
2653
2654 if (nbytes != NULL)
2655 *nbytes = len;
2656 return (p);
2657 }
2658
2659 void
2660 huphandler(int sig)
2661 {
2662 got_sighup = 1;
2663 }
2664
2665 void terminate(int sig)
2666 {
2667 pidfile_remove(pfh);
2668 rpcb_unset(RPCPROG_MNT, RPCMNT_VER1, NULL);
2669 rpcb_unset(RPCPROG_MNT, RPCMNT_VER3, NULL);
2670 exit (0);
2671 }
DragonFly BSD