?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
ispfw.4: Remove extra .Pp
[dragonfly.git] / sbin / mountd / mountd.c
blob7d70d1749339ee11b62ffbfc4ac607326b0f4874
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(int incremental);
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 static void delete_export(struct statfs *fsp);
174 int get_net(char *, struct netmsk *, int);
175 void getexp_err(struct exportlist *, struct grouplist *);
176 struct grouplist *get_grp(void);
177 void hang_dirp(struct dirlist *, struct grouplist *,
178 struct exportlist *, int);
179 void huphandler1(int sig);
180 void huphandler2(int sig);
181 int makemask(struct sockaddr_storage *ssp, int bitlen);
182 void mntsrv(struct svc_req *, SVCXPRT *);
183 void nextfield(char **, char **);
184 void out_of_mem(void);
185 void parsecred(char *, struct ucred *);
186 int put_exlist(struct dirlist *, XDR *, struct dirlist *, int *, int);
187 void *sa_rawaddr(struct sockaddr *sa, int *nbytes);
188 int sacmp(struct sockaddr *sa1, struct sockaddr *sa2,
189 struct sockaddr *samask);
190 int scan_tree(struct dirlist *, struct sockaddr *);
191 static void usage(void);
192 int xdr_dir(XDR *, char *);
193 int xdr_explist(XDR *, caddr_t);
194 int xdr_explist_brief(XDR *, caddr_t);
195 int xdr_fhs(XDR *, caddr_t);
196 int xdr_mlist(XDR *, caddr_t);
197 void terminate(int);
198
199 struct exportlist *exphead;
200 struct mountlist *mlhead;
201 struct grouplist *grphead;
202 char *exnames_default[2] = { _PATH_EXPORTS, NULL };
203 char **exnames;
204 char **hosts = NULL;
205 struct ucred def_anon = {
206 1,
207 (uid_t) -2,
208 1,
209 { (gid_t) -2 }
210 };
211 int force_v2 = 0;
212 int resvport_only = 1;
213 int nhosts = 0;
214 int dir_only = 1;
215 int dolog = 0;
216 int got_sighup1 = 0;
217 int got_sighup2 = 0;
218
219 int xcreated = 0;
220 char *svcport_str = NULL;
221 int opt_flags;
222 static int have_v6 = 1;
223
224 struct pidfh *pfh = NULL;
225 /* Bits for the opt_flags above */
226 #define OP_MAPROOT 0x01
227 #define OP_MAPALL 0x02
228 /* 0x4 free */
229 #define OP_MASK 0x08
230 #define OP_NET 0x10
231 #define OP_ALLDIRS 0x40
232 #define OP_HAVEMASK 0x80 /* A mask was specified or inferred. */
233 #define OP_QUIET 0x100
234 #define OP_MASKLEN 0x200
235
236 #ifdef DEBUG
237 int debug = 1;
238 void SYSLOG(int, const char *, ...);
239 #define syslog SYSLOG
240 #else
241 int debug = 0;
242 #endif
243
244 /*
245 * Mountd server for NFS mount protocol as described in:
246 * NFS: Network File System Protocol Specification, RFC1094, Appendix A
247 * The optional arguments are the exports file name
248 * default: _PATH_EXPORTS
249 * and "-n" to allow nonroot mount.
250 */
251 int
252 main(int argc, char **argv)
253 {
254 fd_set readfds;
255 struct netconfig *nconf;
256 char *endptr, **hosts_bak;
257 void *nc_handle;
258 pid_t otherpid;
259 in_port_t svcport;
260 int c, k, s;
261 int maxrec = RPC_MAXDATASIZE;
262
263 /* Check that another mountd isn't already running. */
264 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &otherpid);
265 if (pfh == NULL) {
266 if (errno == EEXIST)
267 errx(1, "mountd already running, pid: %d.", otherpid);
268 warn("cannot open or create pidfile");
269 }
270
271 s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
272 if (s < 0)
273 have_v6 = 0;
274 else
275 close(s);
276 if (modfind("nfs") < 0) {
277 /* Not present in kernel, try loading it */
278 if (kldload("nfs") < 0 || modfind("nfs") < 0)
279 errx(1, "NFS server is not available or loadable");
280 }
281
282 while ((c = getopt(argc, argv, "2dh:lnp:r")) != -1) {
283 switch (c) {
284 case '2':
285 force_v2 = 1;
286 break;
287 case 'n':
288 resvport_only = 0;
289 break;
290 case 'r':
291 dir_only = 0;
292 break;
293 case 'd':
294 debug = debug ? 0 : 1;
295 break;
296 case 'l':
297 dolog = 1;
298 break;
299 case 'p':
300 endptr = NULL;
301 svcport = (in_port_t)strtoul(optarg, &endptr, 10);
302 if (endptr == NULL || *endptr != '\0' ||
303 svcport == 0 || svcport >= IPPORT_MAX)
304 usage();
305 svcport_str = strdup(optarg);
306 break;
307 case 'h':
308 ++nhosts;
309 hosts_bak = hosts;
310 hosts_bak = realloc(hosts, nhosts * sizeof(char *));
311 if (hosts_bak == NULL) {
312 if (hosts != NULL) {
313 for (k = 0; k < nhosts; k++)
314 free(hosts[k]);
315 free(hosts);
316 out_of_mem();
317 }
318 }
319 hosts = hosts_bak;
320 hosts[nhosts - 1] = strdup(optarg);
321 if (hosts[nhosts - 1] == NULL) {
322 for (k = 0; k < (nhosts - 1); k++)
323 free(hosts[k]);
324 free(hosts);
325 out_of_mem();
326 }
327 break;
328 default:
329 usage();
330 }
331 }
332 if (debug == 0) {
333 daemon(0, 0);
334 signal(SIGINT, SIG_IGN);
335 signal(SIGQUIT, SIG_IGN);
336 }
337 argc -= optind;
338 argv += optind;
339 grphead = NULL;
340 exphead = NULL;
341 mlhead = NULL;
342 if (argc > 0)
343 exnames = argv;
344 else
345 exnames = exnames_default;
346 openlog("mountd", LOG_PID, LOG_DAEMON);
347 if (debug)
348 warnx("getting export list");
349 get_exportlist(0);
350 if (debug)
351 warnx("getting mount list");
352 get_mountlist();
353 if (debug)
354 warnx("here we go");
355 signal(SIGHUP, huphandler1);
356 signal(SIGUSR1, huphandler2);
357 signal(SIGTERM, terminate);
358 signal(SIGPIPE, SIG_IGN);
359
360 pidfile_write(pfh);
361
362 rpcb_unset(RPCPROG_MNT, RPCMNT_VER1, NULL);
363 rpcb_unset(RPCPROG_MNT, RPCMNT_VER3, NULL);
364
365 rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
366
367 if (!resvport_only) {
368 if (sysctlbyname("vfs.nfs.nfs_privport", NULL, NULL,
369 &resvport_only, sizeof(resvport_only)) != 0 &&
370 errno != ENOENT) {
371 syslog(LOG_ERR, "sysctl: %m");
372 exit(1);
373 }
374 }
375
376 /*
377 * If no hosts were specified, add a wildcard entry to bind to
378 * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the
379 * list.
380 */
381 if (nhosts == 0) {
382 hosts = malloc(sizeof(char**));
383 if (hosts == NULL)
384 out_of_mem();
385 hosts[0] = "*";
386 nhosts = 1;
387 } else {
388 hosts_bak = hosts;
389 if (have_v6) {
390 hosts_bak = realloc(hosts, (nhosts + 2) *
391 sizeof(char *));
392 if (hosts_bak == NULL) {
393 for (k = 0; k < nhosts; k++)
394 free(hosts[k]);
395 free(hosts);
396 out_of_mem();
397 } else
398 hosts = hosts_bak;
399 nhosts += 2;
400 hosts[nhosts - 2] = "::1";
401 } else {
402 hosts_bak = realloc(hosts, (nhosts + 1) * sizeof(char *));
403 if (hosts_bak == NULL) {
404 for (k = 0; k < nhosts; k++)
405 free(hosts[k]);
406 free(hosts);
407 out_of_mem();
408 } else {
409 nhosts += 1;
410 hosts = hosts_bak;
411 }
412 }
413 hosts[nhosts - 1] = "127.0.0.1";
414 }
415
416 nc_handle = setnetconfig();
417 while ((nconf = getnetconfig(nc_handle))) {
418 if (nconf->nc_flag & NC_VISIBLE) {
419 if (have_v6 == 0 && strcmp(nconf->nc_protofmly,
420 "inet6") == 0) {
421 /* DO NOTHING */
422 } else
423 create_service(nconf);
424 }
425 }
426 endnetconfig(nc_handle);
427
428 if (xcreated == 0) {
429 syslog(LOG_ERR, "could not create any services");
430 exit(1);
431 }
432
433 /* Expand svc_run() here so that we can call get_exportlist(). */
434 for (;;) {
435 if (got_sighup1) {
436 got_sighup1 = 0;
437 get_exportlist(0);
438 }
439 if (got_sighup2) {
440 got_sighup2 = 0;
441 get_exportlist(1);
442 }
443 readfds = svc_fdset;
444 switch (select(svc_maxfd + 1, &readfds, NULL, NULL, NULL)) {
445 case -1:
446 if (errno == EINTR)
447 continue;
448 syslog(LOG_ERR, "mountd died: select: %m");
449 exit(1);
450 case 0:
451 continue;
452 default:
453 svc_getreqset(&readfds);
454 }
455 }
456 }
457
458 /*
459 * This routine creates and binds sockets on the appropriate
460 * addresses. It gets called one time for each transport and
461 * registrates the service with rpcbind on that trasport.
462 */
463 void
464 create_service(struct netconfig *nconf)
465 {
466 struct addrinfo hints, *res = NULL;
467 struct sockaddr_in *sin;
468 struct sockaddr_in6 *sin6;
469 struct __rpc_sockinfo si;
470 struct netbuf servaddr;
471 SVCXPRT *transp = NULL;
472 int aicode;
473 int fd;
474 int nhostsbak;
475 int one = 1;
476 int r;
477 int registered = 0;
478 u_int32_t host_addr[4]; /* IPv4 or IPv6 */
479
480 if ((nconf->nc_semantics != NC_TPI_CLTS) &&
481 (nconf->nc_semantics != NC_TPI_COTS) &&
482 (nconf->nc_semantics != NC_TPI_COTS_ORD))
483 return; /* not my type */
484
485 /*
486 * XXX - using RPC library internal functions.
487 */
488 if (!__rpc_nconf2sockinfo(nconf, &si)) {
489 syslog(LOG_ERR, "cannot get information for %s",
490 nconf->nc_netid);
491 return;
492 }
493
494 /* Get mountd's address on this transport */
495 memset(&hints, 0, sizeof hints);
496 hints.ai_flags = AI_PASSIVE;
497 hints.ai_family = si.si_af;
498 hints.ai_socktype = si.si_socktype;
499 hints.ai_protocol = si.si_proto;
500
501 /*
502 * Bind to specific IPs if asked to
503 */
504 nhostsbak = nhosts;
505 while (nhostsbak > 0) {
506 --nhostsbak;
507 /*
508 * XXX - using RPC library internal functions.
509 */
510 if ((fd = __rpc_nconf2fd(nconf)) < 0) {
511 int non_fatal = 0;
512 if (errno == EPROTONOSUPPORT &&
513 nconf->nc_semantics != NC_TPI_CLTS)
514 non_fatal = 1;
515
516 syslog(non_fatal ? LOG_DEBUG : LOG_ERR,
517 "cannot create socket for %s", nconf->nc_netid);
518 return;
519 }
520
521 switch (hints.ai_family) {
522 case AF_INET:
523 if (inet_pton(AF_INET, hosts[nhostsbak],
524 host_addr) == 1) {
525 hints.ai_flags &= AI_NUMERICHOST;
526 } else {
527 /*
528 * Skip if we have an AF_INET6 address.
529 */
530 if (inet_pton(AF_INET6, hosts[nhostsbak],
531 host_addr) == 1) {
532 close(fd);
533 continue;
534 }
535 }
536 break;
537 case AF_INET6:
538 if (inet_pton(AF_INET6, hosts[nhostsbak],
539 host_addr) == 1) {
540 hints.ai_flags &= AI_NUMERICHOST;
541 } else {
542 /*
543 * Skip if we have an AF_INET address.
544 */
545 if (inet_pton(AF_INET, hosts[nhostsbak],
546 host_addr) == 1) {
547 close(fd);
548 continue;
549 }
550 }
551
552 /*
553 * We're doing host-based access checks here, so don't
554 * allow v4-in-v6 to confuse things. The kernel will
555 * disable it by default on NFS sockets too.
556 */
557 if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one,
558 sizeof one) < 0) {
559 syslog(LOG_ERR,
560 "can't disable v4-in-v6 on IPv6 socket");
561 exit(1);
562 }
563 break;
564 default:
565 break;
566 }
567
568 /*
569 * If no hosts were specified, just bind to INADDR_ANY
570 */
571 if (strcmp("*", hosts[nhostsbak]) == 0) {
572 if (svcport_str == NULL) {
573 res = malloc(sizeof(struct addrinfo));
574 if (res == NULL)
575 out_of_mem();
576 res->ai_flags = hints.ai_flags;
577 res->ai_family = hints.ai_family;
578 res->ai_protocol = hints.ai_protocol;
579 switch (res->ai_family) {
580 case AF_INET:
581 sin = malloc(sizeof(struct sockaddr_in));
582 if (sin == NULL)
583 out_of_mem();
584 sin->sin_family = AF_INET;
585 sin->sin_port = htons(0);
586 sin->sin_addr.s_addr = htonl(INADDR_ANY);
587 res->ai_addr = (struct sockaddr*) sin;
588 res->ai_addrlen = (socklen_t)
589 sizeof(res->ai_addr);
590 break;
591 case AF_INET6:
592 sin6 = malloc(sizeof(struct sockaddr_in6));
593 if (sin6 == NULL)
594 out_of_mem();
595 sin6->sin6_family = AF_INET6;
596 sin6->sin6_port = htons(0);
597 sin6->sin6_addr = in6addr_any;
598 res->ai_addr = (struct sockaddr*) sin6;
599 res->ai_addrlen = (socklen_t)
600 sizeof(res->ai_addr);
601 break;
602 default:
603 break;
604 }
605 } else {
606 if ((aicode = getaddrinfo(NULL, svcport_str,
607 &hints, &res)) != 0) {
608 syslog(LOG_ERR,
609 "cannot get local address for %s: %s",
610 nconf->nc_netid,
611 gai_strerror(aicode));
612 continue;
613 }
614 }
615 } else {
616 if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str,
617 &hints, &res)) != 0) {
618 syslog(LOG_ERR,
619 "cannot get local address for %s: %s",
620 nconf->nc_netid, gai_strerror(aicode));
621 continue;
622 }
623 }
624
625 {
626 int on = 1;
627
628 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
629 (char *)&on, sizeof(on));
630 }
631
632 r = bindresvport_sa(fd, res->ai_addr);
633 if (r != 0) {
634 syslog(LOG_ERR, "bindresvport_sa: %m");
635 exit(1);
636 }
637
638 if (nconf->nc_semantics != NC_TPI_CLTS)
639 listen(fd, SOMAXCONN);
640
641 if (nconf->nc_semantics == NC_TPI_CLTS )
642 transp = svc_dg_create(fd, 0, 0);
643 else
644 transp = svc_vc_create(fd, RPC_MAXDATASIZE,
645 RPC_MAXDATASIZE);
646
647 if (transp != NULL) {
648 if (!svc_reg(transp, RPCPROG_MNT, RPCMNT_VER1, mntsrv,
649 NULL))
650 syslog(LOG_ERR,
651 "can't register %s RPCMNT_VER1 service",
652 nconf->nc_netid);
653 if (!force_v2) {
654 if (!svc_reg(transp, RPCPROG_MNT, RPCMNT_VER3,
655 mntsrv, NULL))
656 syslog(LOG_ERR,
657 "can't register %s RPCMNT_VER3 service",
658 nconf->nc_netid);
659 }
660 } else
661 syslog(LOG_WARNING, "can't create %s services",
662 nconf->nc_netid);
663
664 if (registered == 0) {
665 registered = 1;
666 memset(&hints, 0, sizeof hints);
667 hints.ai_flags = AI_PASSIVE;
668 hints.ai_family = si.si_af;
669 hints.ai_socktype = si.si_socktype;
670 hints.ai_protocol = si.si_proto;
671
672 if (svcport_str == NULL) {
673 svcport_str = malloc(NI_MAXSERV * sizeof(char));
674 if (svcport_str == NULL)
675 out_of_mem();
676
677 if (getnameinfo(res->ai_addr,
678 res->ai_addr->sa_len, NULL, NI_MAXHOST,
679 svcport_str, NI_MAXSERV * sizeof(char),
680 NI_NUMERICHOST | NI_NUMERICSERV))
681 errx(1, "Cannot get port number");
682 }
683
684 if((aicode = getaddrinfo(NULL, svcport_str, &hints,
685 &res)) != 0) {
686 syslog(LOG_ERR, "cannot get local address: %s",
687 gai_strerror(aicode));
688 exit(1);
689 }
690
691 servaddr.buf = malloc(res->ai_addrlen);
692 memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen);
693 servaddr.len = res->ai_addrlen;
694
695 rpcb_set(RPCPROG_MNT, RPCMNT_VER1, nconf, &servaddr);
696 rpcb_set(RPCPROG_MNT, RPCMNT_VER3, nconf, &servaddr);
697
698 xcreated++;
699 freeaddrinfo(res);
700 }
701 } /* end while */
702 }
703
704 static void
705 usage(void)
706 {
707 fprintf(stderr,
708 "usage: mountd [-2] [-d] [-l] [-n] [-p <port>] [-r] "
709 "[-h <bindip>] [export_file ...]\n");
710 exit(1);
711 }
712
713 /*
714 * The mount rpc service
715 */
716 void
717 mntsrv(struct svc_req *rqstp, SVCXPRT *transp)
718 {
719 struct exportlist *ep;
720 struct dirlist *dp;
721 struct fhreturn fhr;
722 struct stat stb;
723 struct statfs fsb;
724 char host[NI_MAXHOST], numerichost[NI_MAXHOST];
725 int lookup_failed = 1;
726 struct sockaddr *saddr;
727 u_short sport;
728 char rpcpath[RPCMNT_PATHLEN + 1], dirpath[MAXPATHLEN];
729 int bad = 0, defset, hostset;
730 sigset_t sighup_mask;
731
732 sigemptyset(&sighup_mask);
733 sigaddset(&sighup_mask, SIGHUP);
734
735 saddr = svc_getrpccaller(transp)->buf;
736 switch (saddr->sa_family) {
737 case AF_INET6:
738 sport = ntohs(((struct sockaddr_in6 *)saddr)->sin6_port);
739 break;
740 case AF_INET:
741 sport = ntohs(((struct sockaddr_in *)saddr)->sin_port);
742 break;
743 default:
744 syslog(LOG_ERR, "request from unknown address family");
745 return;
746 }
747 lookup_failed = getnameinfo(saddr, saddr->sa_len, host, sizeof host,
748 NULL, 0, 0);
749 getnameinfo(saddr, saddr->sa_len, numerichost,
750 sizeof numerichost, NULL, 0, NI_NUMERICHOST);
751 switch (rqstp->rq_proc) {
752 case NULLPROC:
753 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL))
754 syslog(LOG_ERR, "can't send reply");
755 return;
756 case RPCMNT_MOUNT:
757 if (sport >= IPPORT_RESERVED && resvport_only) {
758 syslog(LOG_NOTICE,
759 "mount request from %s from unprivileged port",
760 numerichost);
761 svcerr_weakauth(transp);
762 return;
763 }
764 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) {
765 syslog(LOG_NOTICE, "undecodable mount request from %s",
766 numerichost);
767 svcerr_decode(transp);
768 return;
769 }
770
771 /*
772 * Get the real pathname and make sure it is a directory
773 * or a regular file if the -r option was specified
774 * and it exists.
775 */
776 if (realpath(rpcpath, dirpath) == NULL ||
777 stat(dirpath, &stb) < 0 ||
778 (!S_ISDIR(stb.st_mode) &&
779 (dir_only || !S_ISREG(stb.st_mode))) ||
780 statfs(dirpath, &fsb) < 0) {
781 chdir("/"); /* Just in case realpath doesn't */
782 syslog(LOG_NOTICE,
783 "mount request from %s for non existent path %s",
784 numerichost, dirpath);
785 if (debug)
786 warnx("stat failed on %s", dirpath);
787 bad = ENOENT; /* We will send error reply later */
788 }
789
790 /* Check in the exports list */
791 sigprocmask(SIG_BLOCK, &sighup_mask, NULL);
792 ep = ex_search(&fsb.f_fsid);
793 hostset = defset = 0;
794 if (ep && (chk_host(ep->ex_defdir, saddr, &defset, &hostset) ||
795 ((dp = dirp_search(ep->ex_dirl, dirpath)) &&
796 chk_host(dp, saddr, &defset, &hostset)) ||
797 (defset && scan_tree(ep->ex_defdir, saddr) == 0 &&
798 scan_tree(ep->ex_dirl, saddr) == 0))) {
799 if (bad) {
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 (hostset & DP_HOSTSET)
807 fhr.fhr_flag = hostset;
808 else
809 fhr.fhr_flag = defset;
810 fhr.fhr_vers = rqstp->rq_vers;
811 /* Get the file handle */
812 memset(&fhr.fhr_fh, 0, sizeof(nfsfh_t));
813 if (getfh(dirpath, (fhandle_t *)&fhr.fhr_fh) < 0) {
814 bad = errno;
815 syslog(LOG_ERR, "can't get fh for %s", dirpath);
816 if (!svc_sendreply(transp, (xdrproc_t)xdr_long,
817 &bad))
818 syslog(LOG_ERR, "can't send reply");
819 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
820 return;
821 }
822 if (!svc_sendreply(transp, (xdrproc_t)xdr_fhs, &fhr))
823 syslog(LOG_ERR, "can't send reply");
824 if (!lookup_failed)
825 add_mlist(host, dirpath);
826 else
827 add_mlist(numerichost, dirpath);
828 if (debug)
829 warnx("mount successful");
830 if (dolog)
831 syslog(LOG_NOTICE,
832 "mount request succeeded from %s for %s",
833 numerichost, dirpath);
834 } else {
835 bad = EACCES;
836 syslog(LOG_NOTICE,
837 "mount request denied from %s for %s",
838 numerichost, dirpath);
839 }
840
841 if (bad && !svc_sendreply(transp, (xdrproc_t)xdr_long, &bad))
842 syslog(LOG_ERR, "can't send reply");
843 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
844 return;
845 case RPCMNT_DUMP:
846 if (!svc_sendreply(transp, (xdrproc_t)xdr_mlist, NULL))
847 syslog(LOG_ERR, "can't send reply");
848 else if (dolog)
849 syslog(LOG_NOTICE,
850 "dump request succeeded from %s",
851 numerichost);
852 return;
853 case RPCMNT_UMOUNT:
854 if (sport >= IPPORT_RESERVED && resvport_only) {
855 syslog(LOG_NOTICE,
856 "umount request from %s from unprivileged port",
857 numerichost);
858 svcerr_weakauth(transp);
859 return;
860 }
861 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) {
862 syslog(LOG_NOTICE, "undecodable umount request from %s",
863 numerichost);
864 svcerr_decode(transp);
865 return;
866 }
867 if (realpath(rpcpath, dirpath) == NULL) {
868 syslog(LOG_NOTICE, "umount request from %s "
869 "for non existent path %s",
870 numerichost, dirpath);
871 }
872 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL))
873 syslog(LOG_ERR, "can't send reply");
874 if (!lookup_failed)
875 del_mlist(host, dirpath);
876 del_mlist(numerichost, dirpath);
877 if (dolog)
878 syslog(LOG_NOTICE,
879 "umount request succeeded from %s for %s",
880 numerichost, dirpath);
881 return;
882 case RPCMNT_UMNTALL:
883 if (sport >= IPPORT_RESERVED && resvport_only) {
884 syslog(LOG_NOTICE,
885 "umountall request from %s from unprivileged port",
886 numerichost);
887 svcerr_weakauth(transp);
888 return;
889 }
890 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL))
891 syslog(LOG_ERR, "can't send reply");
892 if (!lookup_failed)
893 del_mlist(host, NULL);
894 del_mlist(numerichost, NULL);
895 if (dolog)
896 syslog(LOG_NOTICE,
897 "umountall request succeeded from %s",
898 numerichost);
899 return;
900 case RPCMNT_EXPORT:
901 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist, NULL))
902 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist_brief, NULL))
903 syslog(LOG_ERR, "can't send reply");
904 if (dolog)
905 syslog(LOG_NOTICE,
906 "export request succeeded from %s",
907 numerichost);
908 return;
909 default:
910 svcerr_noproc(transp);
911 return;
912 }
913 }
914
915 /*
916 * Xdr conversion for a dirpath string
917 */
918 int
919 xdr_dir(XDR *xdrsp, char *dirp)
920 {
921 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
922 }
923
924 /*
925 * Xdr routine to generate file handle reply
926 */
927 int
928 xdr_fhs(XDR *xdrsp, caddr_t cp)
929 {
930 struct fhreturn *fhrp = (struct fhreturn *)cp;
931 u_long ok = 0, len, auth;
932
933 if (!xdr_long(xdrsp, &ok))
934 return (0);
935 switch (fhrp->fhr_vers) {
936 case 1:
937 return (xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, NFSX_V2FH));
938 case 3:
939 len = NFSX_V3FH;
940 if (!xdr_long(xdrsp, &len))
941 return (0);
942 if (!xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, len))
943 return (0);
944 auth = RPCAUTH_UNIX;
945 len = 1;
946 if (!xdr_long(xdrsp, &len))
947 return (0);
948 return (xdr_long(xdrsp, &auth));
949 }
950 return (0);
951 }
952
953 int
954 xdr_mlist(XDR *xdrsp, caddr_t cp)
955 {
956 struct mountlist *mlp;
957 int true = 1;
958 int false = 0;
959 char *strp;
960
961 mlp = mlhead;
962 while (mlp) {
963 if (!xdr_bool(xdrsp, &true))
964 return (0);
965 strp = &mlp->ml_host[0];
966 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
967 return (0);
968 strp = &mlp->ml_dirp[0];
969 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
970 return (0);
971 mlp = mlp->ml_next;
972 }
973 if (!xdr_bool(xdrsp, &false))
974 return (0);
975 return (1);
976 }
977
978 /*
979 * Xdr conversion for export list
980 */
981 int
982 xdr_explist_common(XDR *xdrsp, caddr_t cp, int brief)
983 {
984 struct exportlist *ep;
985 int false = 0;
986 int putdef;
987 sigset_t sighup_mask;
988
989 sigemptyset(&sighup_mask);
990 sigaddset(&sighup_mask, SIGHUP);
991 sigaddset(&sighup_mask, SIGUSR1);
992 sigprocmask(SIG_BLOCK, &sighup_mask, NULL);
993 ep = exphead;
994 while (ep) {
995 putdef = 0;
996 if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir,
997 &putdef, brief))
998 goto errout;
999 if (ep->ex_defdir && putdef == 0 &&
1000 put_exlist(ep->ex_defdir, xdrsp, NULL,
1001 &putdef, brief))
1002 goto errout;
1003 ep = ep->ex_next;
1004 }
1005 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
1006 if (!xdr_bool(xdrsp, &false))
1007 return (0);
1008 return (1);
1009 errout:
1010 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
1011 return (0);
1012 }
1013
1014 /*
1015 * Called from xdr_explist() to traverse the tree and export the
1016 * directory paths.
1017 */
1018 int
1019 put_exlist(struct dirlist *dp, XDR *xdrsp, struct dirlist *adp, int *putdefp, int brief)
1020 {
1021 struct grouplist *grp;
1022 struct hostlist *hp;
1023 int true = 1;
1024 int false = 0;
1025 int gotalldir = 0;
1026 char *strp;
1027
1028 if (dp) {
1029 if (put_exlist(dp->dp_left, xdrsp, adp, putdefp, brief))
1030 return (1);
1031 if (!xdr_bool(xdrsp, &true))
1032 return (1);
1033 strp = dp->dp_dirp;
1034 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
1035 return (1);
1036 if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) {
1037 gotalldir = 1;
1038 *putdefp = 1;
1039 }
1040 if (brief) {
1041 if (!xdr_bool(xdrsp, &true))
1042 return (1);
1043 strp = "(...)";
1044 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
1045 return (1);
1046 } else if ((dp->dp_flag & DP_DEFSET) == 0 &&
1047 (gotalldir == 0 || (adp->dp_flag & DP_DEFSET) == 0)) {
1048 hp = dp->dp_hosts;
1049 while (hp) {
1050 grp = hp->ht_grp;
1051 if (grp->gr_type == GT_HOST) {
1052 if (!xdr_bool(xdrsp, &true))
1053 return (1);
1054 strp = grp->gr_ptr.gt_addrinfo->ai_canonname;
1055 if (!xdr_string(xdrsp, &strp,
1056 RPCMNT_NAMELEN))
1057 return (1);
1058 } else if (grp->gr_type == GT_NET) {
1059 if (!xdr_bool(xdrsp, &true))
1060 return (1);
1061 strp = grp->gr_ptr.gt_net.nt_name;
1062 if (!xdr_string(xdrsp, &strp,
1063 RPCMNT_NAMELEN))
1064 return (1);
1065 }
1066 hp = hp->ht_next;
1067 if (gotalldir && hp == NULL) {
1068 hp = adp->dp_hosts;
1069 gotalldir = 0;
1070 }
1071 }
1072 }
1073 if (!xdr_bool(xdrsp, &false))
1074 return (1);
1075 if (put_exlist(dp->dp_right, xdrsp, adp, putdefp, brief))
1076 return (1);
1077 }
1078 return (0);
1079 }
1080
1081 int
1082 xdr_explist(XDR *xdrsp, caddr_t cp)
1083 {
1084
1085 return xdr_explist_common(xdrsp, cp, 0);
1086 }
1087
1088 int
1089 xdr_explist_brief(XDR *xdrsp, caddr_t cp)
1090 {
1091
1092 return xdr_explist_common(xdrsp, cp, 1);
1093 }
1094
1095 char *line;
1096 int linesize;
1097 FILE *exp_file;
1098
1099 /*
1100 * Get the export list from one, currently open file
1101 */
1102 static void
1103 get_exportlist_one(void)
1104 {
1105 struct exportlist *ep, *ep2;
1106 struct grouplist *grp, *tgrp;
1107 struct exportlist **epp;
1108 struct dirlist *dirhead;
1109 struct statfs fsb;
1110 struct ucred anon;
1111 char *cp, *endcp, *dirp, *hst, *usr, *dom, savedc;
1112 int len, has_host, exflags, got_nondir, dirplen, netgrp;
1113
1114 dirhead = NULL;
1115 while (get_line()) {
1116 if (debug)
1117 warnx("got line %s", line);
1118 cp = line;
1119 nextfield(&cp, &endcp);
1120 if (*cp == '#')
1121 goto nextline;
1122
1123 /*
1124 * Set defaults.
1125 */
1126 has_host = FALSE;
1127 anon = def_anon;
1128 exflags = MNT_EXPORTED;
1129 got_nondir = 0;
1130 opt_flags = 0;
1131 ep = NULL;
1132
1133 /*
1134 * Create new exports list entry
1135 */
1136 len = endcp-cp;
1137 tgrp = grp = get_grp();
1138 while (len > 0) {
1139 if (len > RPCMNT_NAMELEN) {
1140 getexp_err(ep, tgrp);
1141 goto nextline;
1142 }
1143 if (*cp == '-') {
1144 if (ep == NULL) {
1145 getexp_err(ep, tgrp);
1146 goto nextline;
1147 }
1148 if (debug)
1149 warnx("doing opt %s", cp);
1150 got_nondir = 1;
1151 if (do_opt(&cp, &endcp, ep, grp, &has_host,
1152 &exflags, &anon)) {
1153 getexp_err(ep, tgrp);
1154 goto nextline;
1155 }
1156 } else if (*cp == '/') {
1157 savedc = *endcp;
1158 *endcp = '\0';
1159 if (check_dirpath(cp) &&
1160 statfs(cp, &fsb) >= 0) {
1161 if ((fsb.f_flags & MNT_AUTOMOUNTED) != 0)
1162 syslog(LOG_ERR, "Warning: exporting of "
1163 "automounted fs %s not supported", cp);
1164 if (got_nondir) {
1165 syslog(LOG_ERR, "dirs must be first");
1166 getexp_err(ep, tgrp);
1167 goto nextline;
1168 }
1169 if (ep) {
1170 if (ep->ex_fs.val[0] != fsb.f_fsid.val[0] ||
1171 ep->ex_fs.val[1] != fsb.f_fsid.val[1]) {
1172 getexp_err(ep, tgrp);
1173 goto nextline;
1174 }
1175 } else {
1176 /*
1177 * See if this directory is already
1178 * in the list.
1179 */
1180 ep = ex_search(&fsb.f_fsid);
1181 if (ep == NULL) {
1182 ep = get_exp();
1183 ep->ex_fs = fsb.f_fsid;
1184 ep->ex_fsdir = (char *)
1185 malloc(strlen(fsb.f_mntonname) + 1);
1186 if (ep->ex_fsdir)
1187 strcpy(ep->ex_fsdir,
1188 fsb.f_mntonname);
1189 else
1190 out_of_mem();
1191
1192 delete_export(&fsb);
1193
1194 if (debug)
1195 warnx("making new ep fs=0x%x,0x%x",
1196 fsb.f_fsid.val[0],
1197 fsb.f_fsid.val[1]);
1198 } else if (debug)
1199 warnx("found ep fs=0x%x,0x%x",
1200 fsb.f_fsid.val[0],
1201 fsb.f_fsid.val[1]);
1202 }
1203
1204 /*
1205 * Add dirpath to export mount point.
1206 */
1207 dirp = add_expdir(&dirhead, cp, len);
1208 dirplen = len;
1209 } else {
1210 getexp_err(ep, tgrp);
1211 goto nextline;
1212 }
1213 *endcp = savedc;
1214 } else {
1215 savedc = *endcp;
1216 *endcp = '\0';
1217 got_nondir = 1;
1218 if (ep == NULL) {
1219 getexp_err(ep, tgrp);
1220 goto nextline;
1221 }
1222
1223 /*
1224 * Get the host or netgroup.
1225 */
1226 setnetgrent(cp);
1227 netgrp = getnetgrent(&hst, &usr, &dom);
1228 do {
1229 if (has_host) {
1230 grp->gr_next = get_grp();
1231 grp = grp->gr_next;
1232 }
1233 if (netgrp) {
1234 if (hst == NULL) {
1235 syslog(LOG_ERR,
1236 "null hostname in netgroup %s, skipping", cp);
1237 grp->gr_type = GT_IGNORE;
1238 } else if (get_host(hst, grp, tgrp)) {
1239 syslog(LOG_ERR,
1240 "bad host %s in netgroup %s, skipping", hst, cp);
1241 grp->gr_type = GT_IGNORE;
1242 }
1243 } else if (get_host(cp, grp, tgrp)) {
1244 syslog(LOG_ERR, "bad host %s, skipping", cp);
1245 grp->gr_type = GT_IGNORE;
1246 }
1247 has_host = TRUE;
1248 } while (netgrp && getnetgrent(&hst, &usr, &dom));
1249 endnetgrent();
1250 *endcp = savedc;
1251 }
1252 cp = endcp;
1253 nextfield(&cp, &endcp);
1254 len = endcp - cp;
1255 }
1256 if (check_options(dirhead)) {
1257 getexp_err(ep, tgrp);
1258 goto nextline;
1259 }
1260 if (!has_host) {
1261 grp->gr_type = GT_DEFAULT;
1262 if (debug)
1263 warnx("adding a default entry");
1264
1265 /*
1266 * Don't allow a network export coincide with a list of
1267 * host(s) on the same line.
1268 */
1269 } else if ((opt_flags & OP_NET) && tgrp->gr_next) {
1270 syslog(LOG_ERR, "network/host conflict");
1271 getexp_err(ep, tgrp);
1272 goto nextline;
1273
1274 /*
1275 * If an export list was specified on this line, make sure
1276 * that we have at least one valid entry, otherwise skip it.
1277 */
1278 } else {
1279 grp = tgrp;
1280 while (grp && grp->gr_type == GT_IGNORE)
1281 grp = grp->gr_next;
1282 if (! grp) {
1283 getexp_err(ep, tgrp);
1284 goto nextline;
1285 }
1286 }
1287
1288 /*
1289 * Loop through hosts, pushing the exports into the kernel.
1290 * After loop, tgrp points to the start of the list and
1291 * grp points to the last entry in the list.
1292 */
1293 grp = tgrp;
1294 do {
1295 if (do_mount(ep, grp, exflags, &anon, dirp, dirplen,
1296 &fsb)) {
1297 getexp_err(ep, tgrp);
1298 goto nextline;
1299 }
1300 } while (grp->gr_next && (grp = grp->gr_next));
1301
1302 /*
1303 * Success. Update the data structures.
1304 */
1305 if (has_host) {
1306 hang_dirp(dirhead, tgrp, ep, opt_flags);
1307 grp->gr_next = grphead;
1308 grphead = tgrp;
1309 } else {
1310 hang_dirp(dirhead, NULL, ep,
1311 opt_flags);
1312 free_grp(grp);
1313 }
1314 dirhead = NULL;
1315 if ((ep->ex_flag & EX_LINKED) == 0) {
1316 ep2 = exphead;
1317 epp = &exphead;
1318
1319 /*
1320 * Insert in the list in alphabetical order.
1321 */
1322 while (ep2 && strcmp(ep2->ex_fsdir, ep->ex_fsdir) < 0) {
1323 epp = &ep2->ex_next;
1324 ep2 = ep2->ex_next;
1325 }
1326 if (ep2)
1327 ep->ex_next = ep2;
1328 *epp = ep;
1329 ep->ex_flag |= EX_LINKED;
1330 }
1331 nextline:
1332 if (dirhead) {
1333 free_dir(dirhead);
1334 dirhead = NULL;
1335 }
1336 }
1337 fclose(exp_file);
1338 }
1339
1340 /*
1341 * Get the export list from all specified files.
1342 *
1343 * If incremental is non-zero we were signalled by mount and we do not
1344 * call mountctl() to blow away existing exports.
1345 */
1346 void
1347 get_exportlist(int incremental)
1348 {
1349 struct exportlist *ep, *ep2;
1350 struct grouplist *grp, *tgrp;
1351 struct statfs *fsp, *mntbufp;
1352 struct vfsconf vfc;
1353 char *dirp;
1354 int num, i;
1355 int done;
1356
1357 dirp = NULL;
1358
1359 /*
1360 * First, get rid of the old list
1361 */
1362 ep = exphead;
1363 while (ep) {
1364 ep2 = ep;
1365 ep = ep->ex_next;
1366 free_exp(ep2);
1367 }
1368 exphead = NULL;
1369
1370 grp = grphead;
1371 while (grp) {
1372 tgrp = grp;
1373 grp = grp->gr_next;
1374 free_grp(tgrp);
1375 }
1376 grphead = NULL;
1377
1378 /*
1379 * And delete exports that are in the kernel for all local
1380 * filesystems.
1381 * XXX: Should know how to handle all local exportable filesystems.
1382 */
1383 num = getmntinfo(&mntbufp, MNT_NOWAIT);
1384 for (i = 0; i < num; i++) {
1385 fsp = &mntbufp[i];
1386 if (getvfsbyname(fsp->f_fstypename, &vfc) != 0) {
1387 syslog(LOG_ERR, "getvfsbyname() failed for %s",
1388 fsp->f_fstypename);
1389 continue;
1390 }
1391
1392 /*
1393 * Do not delete export for network filesystem by
1394 * passing "export" arg to mount().
1395 * It only makes sense to do this for local filesystems.
1396 */
1397 if (vfc.vfc_flags & VFCF_NETWORK)
1398 continue;
1399
1400 if (incremental == 0)
1401 delete_export(fsp);
1402 }
1403
1404 /*
1405 * Read in the exports file and build the list, calling
1406 * nmount() as we go along to push the export rules into the kernel.
1407 */
1408 done = 0;
1409 for (i = 0; exnames[i] != NULL; i++) {
1410 if (debug)
1411 warnx("reading exports from %s", exnames[i]);
1412 if ((exp_file = fopen(exnames[i], "r")) == NULL) {
1413 syslog(LOG_WARNING, "can't open %s", exnames[i]);
1414 continue;
1415 }
1416 get_exportlist_one();
1417 fclose(exp_file);
1418 done++;
1419 }
1420 if (done == 0) {
1421 syslog(LOG_ERR, "can't open any exports file");
1422 exit(2);
1423 }
1424 }
1425
1426 /*
1427 * Allocate an export list element
1428 */
1429 struct exportlist *
1430 get_exp(void)
1431 {
1432 struct exportlist *ep;
1433
1434 ep = (struct exportlist *)malloc(sizeof (struct exportlist));
1435 if (ep == NULL)
1436 out_of_mem();
1437 memset(ep, 0, sizeof(struct exportlist));
1438 return (ep);
1439 }
1440
1441 /*
1442 * Allocate a group list element
1443 */
1444 struct grouplist *
1445 get_grp(void)
1446 {
1447 struct grouplist *gp;
1448
1449 gp = (struct grouplist *)malloc(sizeof (struct grouplist));
1450 if (gp == NULL)
1451 out_of_mem();
1452 memset(gp, 0, sizeof(struct grouplist));
1453 return (gp);
1454 }
1455
1456 /*
1457 * Clean up upon an error in get_exportlist().
1458 */
1459 void
1460 getexp_err(struct exportlist *ep, struct grouplist *grp)
1461 {
1462 struct grouplist *tgrp;
1463
1464 if (!(opt_flags & OP_QUIET))
1465 syslog(LOG_ERR, "bad exports list line %s", line);
1466 if (ep && (ep->ex_flag & EX_LINKED) == 0)
1467 free_exp(ep);
1468 while (grp) {
1469 tgrp = grp;
1470 grp = grp->gr_next;
1471 free_grp(tgrp);
1472 }
1473 }
1474
1475 /*
1476 * Search the export list for a matching fs.
1477 */
1478 struct exportlist *
1479 ex_search(fsid_t *fsid)
1480 {
1481 struct exportlist *ep;
1482
1483 ep = exphead;
1484 while (ep) {
1485 if (ep->ex_fs.val[0] == fsid->val[0] &&
1486 ep->ex_fs.val[1] == fsid->val[1])
1487 return (ep);
1488 ep = ep->ex_next;
1489 }
1490 return (ep);
1491 }
1492
1493 /*
1494 * Add a directory path to the list.
1495 */
1496 char *
1497 add_expdir(struct dirlist **dpp, char *cp, int len)
1498 {
1499 struct dirlist *dp;
1500
1501 dp = (struct dirlist *)malloc(sizeof (struct dirlist) + len);
1502 if (dp == NULL)
1503 out_of_mem();
1504 dp->dp_left = *dpp;
1505 dp->dp_right = NULL;
1506 dp->dp_flag = 0;
1507 dp->dp_hosts = NULL;
1508 strcpy(dp->dp_dirp, cp);
1509 *dpp = dp;
1510 return (dp->dp_dirp);
1511 }
1512
1513 /*
1514 * Hang the dir list element off the dirpath binary tree as required
1515 * and update the entry for host.
1516 */
1517 void
1518 hang_dirp(struct dirlist *dp, struct grouplist *grp, struct exportlist *ep,
1519 int flags)
1520 {
1521 struct hostlist *hp;
1522 struct dirlist *dp2;
1523
1524 if (flags & OP_ALLDIRS) {
1525 if (ep->ex_defdir)
1526 free((caddr_t)dp);
1527 else
1528 ep->ex_defdir = dp;
1529 if (grp == NULL) {
1530 ep->ex_defdir->dp_flag |= DP_DEFSET;
1531 } else while (grp) {
1532 hp = get_ht();
1533 hp->ht_grp = grp;
1534 hp->ht_next = ep->ex_defdir->dp_hosts;
1535 ep->ex_defdir->dp_hosts = hp;
1536 grp = grp->gr_next;
1537 }
1538 } else {
1539
1540 /*
1541 * Loop through the directories adding them to the tree.
1542 */
1543 while (dp) {
1544 dp2 = dp->dp_left;
1545 add_dlist(&ep->ex_dirl, dp, grp, flags);
1546 dp = dp2;
1547 }
1548 }
1549 }
1550
1551 /*
1552 * Traverse the binary tree either updating a node that is already there
1553 * for the new directory or adding the new node.
1554 */
1555 void
1556 add_dlist(struct dirlist **dpp, struct dirlist *newdp, struct grouplist *grp,
1557 int flags)
1558 {
1559 struct dirlist *dp;
1560 struct hostlist *hp;
1561 int cmp;
1562
1563 dp = *dpp;
1564 if (dp) {
1565 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp);
1566 if (cmp > 0) {
1567 add_dlist(&dp->dp_left, newdp, grp, flags);
1568 return;
1569 } else if (cmp < 0) {
1570 add_dlist(&dp->dp_right, newdp, grp, flags);
1571 return;
1572 } else
1573 free((caddr_t)newdp);
1574 } else {
1575 dp = newdp;
1576 dp->dp_left = NULL;
1577 *dpp = dp;
1578 }
1579 if (grp) {
1580
1581 /*
1582 * Hang all of the host(s) off of the directory point.
1583 */
1584 do {
1585 hp = get_ht();
1586 hp->ht_grp = grp;
1587 hp->ht_next = dp->dp_hosts;
1588 dp->dp_hosts = hp;
1589 grp = grp->gr_next;
1590 } while (grp);
1591 } else {
1592 dp->dp_flag |= DP_DEFSET;
1593 }
1594 }
1595
1596 /*
1597 * Search for a dirpath on the export point.
1598 */
1599 struct dirlist *
1600 dirp_search(struct dirlist *dp, char *dirp)
1601 {
1602 int cmp;
1603
1604 if (dp) {
1605 cmp = strcmp(dp->dp_dirp, dirp);
1606 if (cmp > 0)
1607 return (dirp_search(dp->dp_left, dirp));
1608 else if (cmp < 0)
1609 return (dirp_search(dp->dp_right, dirp));
1610 else
1611 return (dp);
1612 }
1613 return (dp);
1614 }
1615
1616 /*
1617 * Scan for a host match in a directory tree.
1618 */
1619 int
1620 chk_host(struct dirlist *dp, struct sockaddr *saddr, int *defsetp,
1621 int *hostsetp)
1622 {
1623 struct hostlist *hp;
1624 struct grouplist *grp;
1625 struct addrinfo *ai;
1626
1627 if (dp) {
1628 if (dp->dp_flag & DP_DEFSET)
1629 *defsetp = dp->dp_flag;
1630 hp = dp->dp_hosts;
1631 while (hp) {
1632 grp = hp->ht_grp;
1633 switch (grp->gr_type) {
1634 case GT_HOST:
1635 ai = grp->gr_ptr.gt_addrinfo;
1636 for (; ai; ai = ai->ai_next) {
1637 if (!sacmp(ai->ai_addr, saddr, NULL)) {
1638 *hostsetp =
1639 (hp->ht_flag | DP_HOSTSET);
1640 return (1);
1641 }
1642 }
1643 break;
1644 case GT_NET:
1645 if (!sacmp(saddr, (struct sockaddr *)
1646 &grp->gr_ptr.gt_net.nt_net,
1647 (struct sockaddr *)
1648 &grp->gr_ptr.gt_net.nt_mask)) {
1649 *hostsetp = (hp->ht_flag | DP_HOSTSET);
1650 return (1);
1651 }
1652 break;
1653 }
1654 hp = hp->ht_next;
1655 }
1656 }
1657 return (0);
1658 }
1659
1660 /*
1661 * Scan tree for a host that matches the address.
1662 */
1663 int
1664 scan_tree(struct dirlist *dp, struct sockaddr *saddr)
1665 {
1666 int defset, hostset;
1667
1668 if (dp) {
1669 if (scan_tree(dp->dp_left, saddr))
1670 return (1);
1671 if (chk_host(dp, saddr, &defset, &hostset))
1672 return (1);
1673 if (scan_tree(dp->dp_right, saddr))
1674 return (1);
1675 }
1676 return (0);
1677 }
1678
1679 /*
1680 * Traverse the dirlist tree and free it up.
1681 */
1682 void
1683 free_dir(struct dirlist *dp)
1684 {
1685
1686 if (dp) {
1687 free_dir(dp->dp_left);
1688 free_dir(dp->dp_right);
1689 free_host(dp->dp_hosts);
1690 free((caddr_t)dp);
1691 }
1692 }
1693
1694 /*
1695 * Parse the option string and update fields.
1696 * Option arguments may either be -<option>=<value> or
1697 * -<option> <value>
1698 */
1699 int
1700 do_opt(char **cpp, char **endcpp, struct exportlist *ep, struct grouplist *grp,
1701 int *has_hostp, int *exflagsp, struct ucred *cr)
1702 {
1703 char *cpoptarg, *cpoptend;
1704 char *cp, *endcp, *cpopt, savedc, savedc2;
1705 int allflag, usedarg;
1706
1707 savedc2 = '\0';
1708 cpopt = *cpp;
1709 cpopt++;
1710 cp = *endcpp;
1711 savedc = *cp;
1712 *cp = '\0';
1713 while (cpopt && *cpopt) {
1714 allflag = 1;
1715 usedarg = -2;
1716 if ((cpoptend = strchr(cpopt, ','))) {
1717 *cpoptend++ = '\0';
1718 if ((cpoptarg = strchr(cpopt, '=')))
1719 *cpoptarg++ = '\0';
1720 } else {
1721 if ((cpoptarg = strchr(cpopt, '=')))
1722 *cpoptarg++ = '\0';
1723 else {
1724 *cp = savedc;
1725 nextfield(&cp, &endcp);
1726 **endcpp = '\0';
1727 if (endcp > cp && *cp != '-') {
1728 cpoptarg = cp;
1729 savedc2 = *endcp;
1730 *endcp = '\0';
1731 usedarg = 0;
1732 }
1733 }
1734 }
1735 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) {
1736 *exflagsp |= MNT_EXRDONLY;
1737 } else if (cpoptarg && (!strcmp(cpopt, "maproot") ||
1738 !(allflag = strcmp(cpopt, "mapall")) ||
1739 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) {
1740 usedarg++;
1741 parsecred(cpoptarg, cr);
1742 if (allflag == 0) {
1743 *exflagsp |= MNT_EXPORTANON;
1744 opt_flags |= OP_MAPALL;
1745 } else
1746 opt_flags |= OP_MAPROOT;
1747 } else if (cpoptarg && (!strcmp(cpopt, "mask") ||
1748 !strcmp(cpopt, "m"))) {
1749 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) {
1750 syslog(LOG_ERR, "bad mask: %s", cpoptarg);
1751 return (1);
1752 }
1753 usedarg++;
1754 opt_flags |= OP_MASK;
1755 } else if (cpoptarg && (!strcmp(cpopt, "network") ||
1756 !strcmp(cpopt, "n"))) {
1757 if (strchr(cpoptarg, '/') != NULL) {
1758 if (debug)
1759 fprintf(stderr, "setting OP_MASKLEN\n");
1760 opt_flags |= OP_MASKLEN;
1761 }
1762 if (grp->gr_type != GT_NULL) {
1763 syslog(LOG_ERR, "network/host conflict");
1764 return (1);
1765 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) {
1766 syslog(LOG_ERR, "bad net: %s", cpoptarg);
1767 return (1);
1768 }
1769 grp->gr_type = GT_NET;
1770 *has_hostp = 1;
1771 usedarg++;
1772 opt_flags |= OP_NET;
1773 } else if (!strcmp(cpopt, "alldirs")) {
1774 opt_flags |= OP_ALLDIRS;
1775 } else if (!strcmp(cpopt, "public")) {
1776 *exflagsp |= MNT_EXPUBLIC;
1777 } else if (!strcmp(cpopt, "webnfs")) {
1778 *exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON);
1779 opt_flags |= OP_MAPALL;
1780 } else if (cpoptarg && !strcmp(cpopt, "index")) {
1781 ep->ex_indexfile = strdup(cpoptarg);
1782 } else if (!strcmp(cpopt, "quiet")) {
1783 opt_flags |= OP_QUIET;
1784 } else {
1785 syslog(LOG_ERR, "bad opt %s", cpopt);
1786 return (1);
1787 }
1788 if (usedarg >= 0) {
1789 *endcp = savedc2;
1790 **endcpp = savedc;
1791 if (usedarg > 0) {
1792 *cpp = cp;
1793 *endcpp = endcp;
1794 }
1795 return (0);
1796 }
1797 cpopt = cpoptend;
1798 }
1799 **endcpp = savedc;
1800 return (0);
1801 }
1802
1803 /*
1804 * Translate a character string to the corresponding list of network
1805 * addresses for a hostname.
1806 */
1807 int
1808 get_host(char *cp, struct grouplist *grp, struct grouplist *tgrp)
1809 {
1810 struct grouplist *checkgrp;
1811 struct addrinfo *ai, *tai, hints;
1812 int ecode;
1813 char host[NI_MAXHOST];
1814
1815 if (grp->gr_type != GT_NULL) {
1816 syslog(LOG_ERR, "Bad netgroup type for ip host %s", cp);
1817 return (1);
1818 }
1819 memset(&hints, 0, sizeof hints);
1820 hints.ai_flags = AI_CANONNAME;
1821 hints.ai_protocol = IPPROTO_UDP;
1822 ecode = getaddrinfo(cp, NULL, &hints, &ai);
1823 if (ecode != 0) {
1824 syslog(LOG_ERR,"can't get address info for host %s", cp);
1825 return 1;
1826 }
1827 grp->gr_ptr.gt_addrinfo = ai;
1828 while (ai != NULL) {
1829 if (ai->ai_canonname == NULL) {
1830 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, host,
1831 sizeof host, NULL, 0, NI_NUMERICHOST) != 0)
1832 strlcpy(host, "?", sizeof(host));
1833 ai->ai_canonname = strdup(host);
1834 ai->ai_flags |= AI_CANONNAME;
1835 }
1836 if (debug)
1837 fprintf(stderr, "got host %s\n", ai->ai_canonname);
1838 /*
1839 * Sanity check: make sure we don't already have an entry
1840 * for this host in the grouplist.
1841 */
1842 for (checkgrp = tgrp; checkgrp != NULL;
1843 checkgrp = checkgrp->gr_next) {
1844 if (checkgrp->gr_type != GT_HOST)
1845 continue;
1846 for (tai = checkgrp->gr_ptr.gt_addrinfo; tai != NULL;
1847 tai = tai->ai_next) {
1848 if (sacmp(tai->ai_addr, ai->ai_addr, NULL) != 0)
1849 continue;
1850 if (debug)
1851 fprintf(stderr,
1852 "ignoring duplicate host %s\n",
1853 ai->ai_canonname);
1854 grp->gr_type = GT_IGNORE;
1855 return (0);
1856 }
1857 }
1858 ai = ai->ai_next;
1859 }
1860 grp->gr_type = GT_HOST;
1861 return (0);
1862 }
1863
1864 /*
1865 * Free up an exports list component
1866 */
1867 void
1868 free_exp(struct exportlist *ep)
1869 {
1870
1871 if (ep->ex_defdir) {
1872 free_host(ep->ex_defdir->dp_hosts);
1873 free((caddr_t)ep->ex_defdir);
1874 }
1875 if (ep->ex_fsdir)
1876 free(ep->ex_fsdir);
1877 if (ep->ex_indexfile)
1878 free(ep->ex_indexfile);
1879 free_dir(ep->ex_dirl);
1880 free((caddr_t)ep);
1881 }
1882
1883 /*
1884 * Free hosts.
1885 */
1886 void
1887 free_host(struct hostlist *hp)
1888 {
1889 struct hostlist *hp2;
1890
1891 while (hp) {
1892 hp2 = hp;
1893 hp = hp->ht_next;
1894 free((caddr_t)hp2);
1895 }
1896 }
1897
1898 struct hostlist *
1899 get_ht(void)
1900 {
1901 struct hostlist *hp;
1902
1903 hp = (struct hostlist *)malloc(sizeof (struct hostlist));
1904 if (hp == NULL)
1905 out_of_mem();
1906 hp->ht_next = NULL;
1907 hp->ht_flag = 0;
1908 return (hp);
1909 }
1910
1911 /*
1912 * Out of memory, fatal
1913 */
1914 void
1915 out_of_mem(void)
1916 {
1917
1918 syslog(LOG_ERR, "out of memory");
1919 exit(2);
1920 }
1921
1922 /*
1923 * Do the mount syscall with the update flag to push the export info into
1924 * the kernel.
1925 */
1926 int
1927 do_mount(struct exportlist *ep, struct grouplist *grp, int exflags,
1928 struct ucred *anoncrp, char *dirp, int dirplen, struct statfs *fsb)
1929 {
1930 struct statfs fsb1;
1931 struct addrinfo *ai;
1932 struct export_args *eap;
1933 char *cp = NULL;
1934 int done;
1935 char savedc = '\0';
1936 union {
1937 struct ufs_args ua;
1938 struct iso_args ia;
1939 struct mfs_args ma;
1940 struct msdosfs_args da;
1941 struct ntfs_args na;
1942 } args;
1943
1944 bzero(&args, sizeof args);
1945 /* XXX, we assume that all xx_args look like ufs_args. */
1946 args.ua.fspec = 0;
1947 eap = &args.ua.export;
1948
1949 eap->ex_flags = exflags;
1950 eap->ex_anon = *anoncrp;
1951 eap->ex_indexfile = ep->ex_indexfile;
1952 if (grp->gr_type == GT_HOST)
1953 ai = grp->gr_ptr.gt_addrinfo;
1954 else
1955 ai = NULL;
1956 done = FALSE;
1957 while (!done) {
1958 switch (grp->gr_type) {
1959 case GT_HOST:
1960 if (ai->ai_addr->sa_family == AF_INET6 && have_v6 == 0)
1961 goto skip;
1962 eap->ex_addr = ai->ai_addr;
1963 eap->ex_addrlen = ai->ai_addrlen;
1964 eap->ex_masklen = 0;
1965 break;
1966 case GT_NET:
1967 if (grp->gr_ptr.gt_net.nt_net.ss_family == AF_INET6 &&
1968 have_v6 == 0)
1969 goto skip;
1970 eap->ex_addr =
1971 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_net;
1972 eap->ex_addrlen = args.ua.export.ex_addr->sa_len;
1973 eap->ex_mask =
1974 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask;
1975 eap->ex_masklen = args.ua.export.ex_mask->sa_len;
1976 break;
1977 case GT_DEFAULT:
1978 eap->ex_addr = NULL;
1979 eap->ex_addrlen = 0;
1980 eap->ex_mask = NULL;
1981 eap->ex_masklen = 0;
1982 break;
1983 case GT_IGNORE:
1984 return(0);
1985 break;
1986 default:
1987 syslog(LOG_ERR, "bad grouptype");
1988 if (cp)
1989 *cp = savedc;
1990 return (1);
1991 }
1992
1993 /*
1994 * XXX:
1995 * Maybe I should just use the fsb->f_mntonname path instead
1996 * of looping back up the dirp to the mount point??
1997 * Also, needs to know how to export all types of local
1998 * exportable filesystems and not just "ufs".
1999 */
2000 for (;;) {
2001 int r;
2002
2003 r = mountctl(fsb->f_mntonname, MOUNTCTL_SET_EXPORT,
2004 -1,
2005 &args.ua.export, sizeof(args.ua.export),
2006 NULL, 0);
2007 if (r < 0 && errno == EOPNOTSUPP) {
2008 r = mount(fsb->f_fstypename, dirp,
2009 fsb->f_flags | MNT_UPDATE,
2010 (caddr_t)&args);
2011 }
2012 if (r >= 0)
2013 break;
2014 if (cp)
2015 *cp-- = savedc;
2016 else
2017 cp = dirp + dirplen - 1;
2018 if (opt_flags & OP_QUIET)
2019 return (1);
2020 if (errno == EPERM) {
2021 if (debug)
2022 warnx("can't change attributes for %s",
2023 dirp);
2024 syslog(LOG_ERR,
2025 "can't change attributes for %s", dirp);
2026 return (1);
2027 }
2028 if (opt_flags & OP_ALLDIRS) {
2029 if (errno == EINVAL)
2030 syslog(LOG_ERR,
2031 "-alldirs requested but %s is not a filesystem mountpoint",
2032 dirp);
2033 else
2034 syslog(LOG_ERR,
2035 "could not remount %s: %m",
2036 dirp);
2037 return (1);
2038 }
2039 /* back up over the last component */
2040 while (*cp == '/' && cp > dirp)
2041 cp--;
2042 while (*(cp - 1) != '/' && cp > dirp)
2043 cp--;
2044 if (cp == dirp) {
2045 if (debug)
2046 warnx("mnt unsucc");
2047 syslog(LOG_ERR, "can't export %s", dirp);
2048 return (1);
2049 }
2050 savedc = *cp;
2051 *cp = '\0';
2052 /* Check that we're still on the same filesystem. */
2053 if (statfs(dirp, &fsb1) != 0 || bcmp(&fsb1.f_fsid,
2054 &fsb->f_fsid, sizeof(fsb1.f_fsid)) != 0) {
2055 *cp = savedc;
2056 syslog(LOG_ERR, "can't export %s", dirp);
2057 return (1);
2058 }
2059 }
2060 skip:
2061 if (ai != NULL)
2062 ai = ai->ai_next;
2063 if (ai == NULL)
2064 done = TRUE;
2065 }
2066 if (cp)
2067 *cp = savedc;
2068 return (0);
2069 }
2070
2071 /*
2072 * Translate a net address.
2073 *
2074 * If `maskflg' is nonzero, then `cp' is a netmask, not a network address.
2075 */
2076 int
2077 get_net(char *cp, struct netmsk *net, int maskflg)
2078 {
2079 struct netent *np = NULL;
2080 char *name, *p, *prefp;
2081 struct sockaddr_in sin;
2082 struct sockaddr *sa = NULL;
2083 struct addrinfo hints, *ai = NULL;
2084 char netname[NI_MAXHOST];
2085 long preflen;
2086
2087 p = prefp = NULL;
2088 if ((opt_flags & OP_MASKLEN) && !maskflg) {
2089 p = strchr(cp, '/');
2090 *p = '\0';
2091 prefp = p + 1;
2092 }
2093
2094 /*
2095 * Check for a numeric address first. We wish to avoid
2096 * possible DNS lookups in getnetbyname().
2097 */
2098 if (isxdigit(*cp) || *cp == ':') {
2099 memset(&hints, 0, sizeof hints);
2100 /* Ensure the mask and the network have the same family. */
2101 if (maskflg && (opt_flags & OP_NET))
2102 hints.ai_family = net->nt_net.ss_family;
2103 else if (!maskflg && (opt_flags & OP_HAVEMASK))
2104 hints.ai_family = net->nt_mask.ss_family;
2105 else
2106 hints.ai_family = AF_UNSPEC;
2107 hints.ai_flags = AI_NUMERICHOST;
2108 if (getaddrinfo(cp, NULL, &hints, &ai) == 0)
2109 sa = ai->ai_addr;
2110 if (sa != NULL && ai->ai_family == AF_INET) {
2111 /*
2112 * The address in `cp' is really a network address, so
2113 * use inet_network() to re-interpret this correctly.
2114 * e.g. "127.1" means 127.1.0.0, not 127.0.0.1.
2115 */
2116 bzero(&sin, sizeof sin);
2117 sin.sin_family = AF_INET;
2118 sin.sin_len = sizeof sin;
2119 sin.sin_addr = inet_makeaddr(inet_network(cp), 0);
2120 if (debug)
2121 fprintf(stderr, "get_net: v4 addr %s\n",
2122 inet_ntoa(sin.sin_addr));
2123 sa = (struct sockaddr *)&sin;
2124 }
2125 }
2126 if (sa == NULL && (np = getnetbyname(cp)) != NULL) {
2127 bzero(&sin, sizeof sin);
2128 sin.sin_family = AF_INET;
2129 sin.sin_len = sizeof sin;
2130 sin.sin_addr = inet_makeaddr(np->n_net, 0);
2131 sa = (struct sockaddr *)&sin;
2132 }
2133 if (sa == NULL)
2134 goto fail;
2135
2136 if (maskflg) {
2137 /* The specified sockaddr is a mask. */
2138 if (checkmask(sa) != 0)
2139 goto fail;
2140 bcopy(sa, &net->nt_mask, sa->sa_len);
2141 opt_flags |= OP_HAVEMASK;
2142 } else {
2143 /* The specified sockaddr is a network address. */
2144 bcopy(sa, &net->nt_net, sa->sa_len);
2145
2146 /* Get a network name for the export list. */
2147 if (np) {
2148 name = np->n_name;
2149 } else if (getnameinfo(sa, sa->sa_len, netname, sizeof netname,
2150 NULL, 0, NI_NUMERICHOST) == 0) {
2151 name = netname;
2152 } else {
2153 goto fail;
2154 }
2155 if ((net->nt_name = strdup(name)) == NULL)
2156 out_of_mem();
2157
2158 /*
2159 * Extract a mask from either a "/<masklen>" suffix, or
2160 * from the class of an IPv4 address.
2161 */
2162 if (opt_flags & OP_MASKLEN) {
2163 preflen = strtol(prefp, NULL, 10);
2164 if (preflen < 0L || preflen == LONG_MAX)
2165 goto fail;
2166 bcopy(sa, &net->nt_mask, sa->sa_len);
2167 if (makemask(&net->nt_mask, (int)preflen) != 0)
2168 goto fail;
2169 opt_flags |= OP_HAVEMASK;
2170 *p = '/';
2171 } else if (sa->sa_family == AF_INET &&
2172 (opt_flags & OP_MASK) == 0) {
2173 in_addr_t addr;
2174
2175 addr = ((struct sockaddr_in *)sa)->sin_addr.s_addr;
2176 if (IN_CLASSA(addr))
2177 preflen = 8;
2178 else if (IN_CLASSB(addr))
2179 preflen = 16;
2180 else if (IN_CLASSC(addr))
2181 preflen = 24;
2182 else if (IN_CLASSD(addr))
2183 preflen = 28;
2184 else
2185 preflen = 32; /* XXX */
2186
2187 bcopy(sa, &net->nt_mask, sa->sa_len);
2188 makemask(&net->nt_mask, (int)preflen);
2189 opt_flags |= OP_HAVEMASK;
2190 }
2191 }
2192
2193 if (ai)
2194 freeaddrinfo(ai);
2195 return 0;
2196
2197 fail:
2198 if (ai)
2199 freeaddrinfo(ai);
2200 return 1;
2201 }
2202
2203 /*
2204 * Parse out the next white space separated field
2205 */
2206 void
2207 nextfield(char **cp, char **endcp)
2208 {
2209 char *p;
2210
2211 p = *cp;
2212 while (*p == ' ' || *p == '\t')
2213 p++;
2214 if (*p == '\n' || *p == '\0')
2215 *cp = *endcp = p;
2216 else {
2217 *cp = p++;
2218 while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0')
2219 p++;
2220 *endcp = p;
2221 }
2222 }
2223
2224 /*
2225 * Get an exports file line. Skip over blank lines and handle line
2226 * continuations.
2227 */
2228 int
2229 get_line(void)
2230 {
2231 char *p, *cp;
2232 size_t len;
2233 int totlen, cont_line;
2234
2235 /*
2236 * Loop around ignoring blank lines and getting all continuation lines.
2237 */
2238 p = line;
2239 totlen = 0;
2240 do {
2241 if ((p = fgetln(exp_file, &len)) == NULL)
2242 return (0);
2243 cp = p + len - 1;
2244 cont_line = 0;
2245 while (cp >= p &&
2246 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) {
2247 if (*cp == '\\')
2248 cont_line = 1;
2249 cp--;
2250 len--;
2251 }
2252 if (cont_line) {
2253 *++cp = ' ';
2254 len++;
2255 }
2256 if (linesize < len + totlen + 1) {
2257 linesize = len + totlen + 1;
2258 line = realloc(line, linesize);
2259 if (line == NULL)
2260 out_of_mem();
2261 }
2262 memcpy(line + totlen, p, len);
2263 totlen += len;
2264 line[totlen] = '\0';
2265 } while (totlen == 0 || cont_line);
2266 return (1);
2267 }
2268
2269 /*
2270 * Parse a description of a credential.
2271 */
2272 void
2273 parsecred(char *namelist, struct ucred *cr)
2274 {
2275 char *name;
2276 int cnt;
2277 char *names;
2278 struct passwd *pw;
2279 struct group *gr;
2280 gid_t ngroups, groups[NGROUPS + 1];
2281
2282 /*
2283 * Set up the unprivileged user.
2284 */
2285 cr->cr_ref = 1;
2286 cr->cr_uid = -2;
2287 cr->cr_groups[0] = -2;
2288 cr->cr_ngroups = 1;
2289 /*
2290 * Get the user's password table entry.
2291 */
2292 names = strsep(&namelist, " \t\n");
2293 name = strsep(&names, ":");
2294 if (isdigit(*name) || *name == '-')
2295 pw = getpwuid(atoi(name));
2296 else
2297 pw = getpwnam(name);
2298 /*
2299 * Credentials specified as those of a user.
2300 */
2301 if (names == NULL) {
2302 if (pw == NULL) {
2303 syslog(LOG_ERR, "unknown user: %s", name);
2304 return;
2305 }
2306 cr->cr_uid = pw->pw_uid;
2307 ngroups = NGROUPS + 1;
2308 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups))
2309 syslog(LOG_ERR, "too many groups");
2310 /*
2311 * Compress out duplicate
2312 */
2313 cr->cr_ngroups = ngroups - 1;
2314 cr->cr_groups[0] = groups[0];
2315 for (cnt = 2; cnt < ngroups; cnt++)
2316 cr->cr_groups[cnt - 1] = groups[cnt];
2317 return;
2318 }
2319 /*
2320 * Explicit credential specified as a colon separated list:
2321 * uid:gid:gid:...
2322 */
2323 if (pw != NULL)
2324 cr->cr_uid = pw->pw_uid;
2325 else if (isdigit(*name) || *name == '-')
2326 cr->cr_uid = atoi(name);
2327 else {
2328 syslog(LOG_ERR, "unknown user: %s", name);
2329 return;
2330 }
2331 cr->cr_ngroups = 0;
2332 while (names != NULL && *names != '\0' && cr->cr_ngroups < NGROUPS) {
2333 name = strsep(&names, ":");
2334 if (isdigit(*name) || *name == '-') {
2335 cr->cr_groups[cr->cr_ngroups++] = atoi(name);
2336 } else {
2337 if ((gr = getgrnam(name)) == NULL) {
2338 syslog(LOG_ERR, "unknown group: %s", name);
2339 continue;
2340 }
2341 cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid;
2342 }
2343 }
2344 if (names != NULL && *names != '\0' && cr->cr_ngroups == NGROUPS)
2345 syslog(LOG_ERR, "too many groups");
2346 }
2347
2348 #define STRSIZ (RPCMNT_NAMELEN+RPCMNT_PATHLEN+50)
2349 /*
2350 * Routines that maintain the remote mounttab
2351 */
2352 void
2353 get_mountlist(void)
2354 {
2355 struct mountlist *mlp, **mlpp;
2356 char *host, *dirp, *cp;
2357 char str[STRSIZ];
2358 FILE *mlfile;
2359
2360 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) {
2361 if (errno == ENOENT)
2362 return;
2363 else {
2364 syslog(LOG_ERR, "can't open %s", _PATH_RMOUNTLIST);
2365 return;
2366 }
2367 }
2368 mlpp = &mlhead;
2369 while (fgets(str, STRSIZ, mlfile) != NULL) {
2370 cp = str;
2371 host = strsep(&cp, " \t\n");
2372 dirp = strsep(&cp, " \t\n");
2373 if (host == NULL || dirp == NULL)
2374 continue;
2375 mlp = (struct mountlist *)malloc(sizeof (*mlp));
2376 if (mlp == NULL)
2377 out_of_mem();
2378 strncpy(mlp->ml_host, host, RPCMNT_NAMELEN);
2379 mlp->ml_host[RPCMNT_NAMELEN] = '\0';
2380 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN);
2381 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0';
2382 mlp->ml_next = NULL;
2383 *mlpp = mlp;
2384 mlpp = &mlp->ml_next;
2385 }
2386 fclose(mlfile);
2387 }
2388
2389 static
2390 void
2391 delete_export(struct statfs *fsp)
2392 {
2393 union {
2394 struct ufs_args ua;
2395 struct iso_args ia;
2396 struct mfs_args ma;
2397 struct msdosfs_args da;
2398 struct ntfs_args na;
2399 } targs;
2400 struct export_args export;
2401
2402 export.ex_flags = MNT_DELEXPORT;
2403 if (mountctl(fsp->f_mntonname, MOUNTCTL_SET_EXPORT, -1,
2404 &export, sizeof(export), NULL, 0) == 0) {
2405 /* ok */
2406 } else if (!strcmp(fsp->f_fstypename, "mfs") ||
2407 !strcmp(fsp->f_fstypename, "ufs") ||
2408 !strcmp(fsp->f_fstypename, "msdos") ||
2409 !strcmp(fsp->f_fstypename, "ntfs") ||
2410 !strcmp(fsp->f_fstypename, "cd9660")) {
2411 bzero(&targs, sizeof targs);
2412 targs.ua.fspec = NULL;
2413 targs.ua.export.ex_flags = MNT_DELEXPORT;
2414 if (mount(fsp->f_fstypename, fsp->f_mntonname,
2415 fsp->f_flags | MNT_UPDATE,
2416 (caddr_t)&targs) < 0)
2417 syslog(LOG_ERR, "can't delete exports for %s",
2418 fsp->f_mntonname);
2419 }
2420 }
2421
2422
2423 void
2424 del_mlist(char *hostp, char *dirp)
2425 {
2426 struct mountlist *mlp, **mlpp;
2427 struct mountlist *mlp2;
2428 FILE *mlfile;
2429 int fnd = 0;
2430
2431 mlpp = &mlhead;
2432 mlp = mlhead;
2433 while (mlp) {
2434 if (!strcmp(mlp->ml_host, hostp) &&
2435 (!dirp || !strcmp(mlp->ml_dirp, dirp))) {
2436 fnd = 1;
2437 mlp2 = mlp;
2438 *mlpp = mlp = mlp->ml_next;
2439 free((caddr_t)mlp2);
2440 } else {
2441 mlpp = &mlp->ml_next;
2442 mlp = mlp->ml_next;
2443 }
2444 }
2445 if (fnd) {
2446 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) {
2447 syslog(LOG_ERR,"can't update %s", _PATH_RMOUNTLIST);
2448 return;
2449 }
2450 mlp = mlhead;
2451 while (mlp) {
2452 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
2453 mlp = mlp->ml_next;
2454 }
2455 fclose(mlfile);
2456 }
2457 }
2458
2459 void
2460 add_mlist(char *hostp, char *dirp)
2461 {
2462 struct mountlist *mlp, **mlpp;
2463 FILE *mlfile;
2464
2465 mlpp = &mlhead;
2466 mlp = mlhead;
2467 while (mlp) {
2468 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp))
2469 return;
2470 mlpp = &mlp->ml_next;
2471 mlp = mlp->ml_next;
2472 }
2473 mlp = (struct mountlist *)malloc(sizeof (*mlp));
2474 if (mlp == NULL)
2475 out_of_mem();
2476 strncpy(mlp->ml_host, hostp, RPCMNT_NAMELEN);
2477 mlp->ml_host[RPCMNT_NAMELEN] = '\0';
2478 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN);
2479 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0';
2480 mlp->ml_next = NULL;
2481 *mlpp = mlp;
2482 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) {
2483 syslog(LOG_ERR, "can't update %s", _PATH_RMOUNTLIST);
2484 return;
2485 }
2486 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
2487 fclose(mlfile);
2488 }
2489
2490 /*
2491 * Free up a group list.
2492 */
2493 void
2494 free_grp(struct grouplist *grp)
2495 {
2496 if (grp->gr_type == GT_HOST) {
2497 if (grp->gr_ptr.gt_addrinfo != NULL)
2498 freeaddrinfo(grp->gr_ptr.gt_addrinfo);
2499 } else if (grp->gr_type == GT_NET) {
2500 if (grp->gr_ptr.gt_net.nt_name)
2501 free(grp->gr_ptr.gt_net.nt_name);
2502 }
2503 free((caddr_t)grp);
2504 }
2505
2506 #ifdef DEBUG
2507 void
2508 SYSLOG(int pri, const char *fmt, ...)
2509 {
2510 va_list ap;
2511
2512 va_start(ap, fmt);
2513 vfprintf(stderr, fmt, ap);
2514 va_end(ap);
2515 }
2516 #endif /* DEBUG */
2517
2518 /*
2519 * Check options for consistency.
2520 */
2521 int
2522 check_options(struct dirlist *dp)
2523 {
2524
2525 if (dp == NULL)
2526 return (1);
2527 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL)) {
2528 syslog(LOG_ERR, "-mapall and -maproot mutually exclusive");
2529 return (1);
2530 }
2531 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) {
2532 syslog(LOG_ERR, "-mask requires -network");
2533 return (1);
2534 }
2535 if ((opt_flags & OP_NET) && (opt_flags & OP_HAVEMASK) == 0) {
2536 syslog(LOG_ERR, "-network requires mask specification");
2537 return (1);
2538 }
2539 if ((opt_flags & OP_MASK) && (opt_flags & OP_MASKLEN)) {
2540 syslog(LOG_ERR, "-mask and /masklen are mutually exclusive");
2541 return (1);
2542 }
2543 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) {
2544 syslog(LOG_ERR, "-alldirs has multiple directories");
2545 return (1);
2546 }
2547 return (0);
2548 }
2549
2550 /*
2551 * Check an absolute directory path for any symbolic links. Return true
2552 */
2553 int
2554 check_dirpath(char *dirp)
2555 {
2556 char *cp;
2557 int ret = 1;
2558 struct stat sb;
2559
2560 cp = dirp + 1;
2561 while (*cp && ret) {
2562 if (*cp == '/') {
2563 *cp = '\0';
2564 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode))
2565 ret = 0;
2566 *cp = '/';
2567 }
2568 cp++;
2569 }
2570 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode))
2571 ret = 0;
2572 return (ret);
2573 }
2574
2575 /*
2576 * Make a netmask according to the specified prefix length. The ss_family
2577 * and other non-address fields must be initialised before calling this.
2578 */
2579 int
2580 makemask(struct sockaddr_storage *ssp, int bitlen)
2581 {
2582 u_char *p;
2583 int bits, i, len;
2584
2585 if ((p = sa_rawaddr((struct sockaddr *)ssp, &len)) == NULL)
2586 return (-1);
2587 if (bitlen > len * CHAR_BIT)
2588 return (-1);
2589 for (i = 0; i < len; i++) {
2590 bits = (bitlen > CHAR_BIT) ? CHAR_BIT : bitlen;
2591 *p++ = (1 << bits) - 1;
2592 bitlen -= bits;
2593 }
2594 return 0;
2595 }
2596
2597 /*
2598 * Check that the sockaddr is a valid netmask. Returns 0 if the mask
2599 * is acceptable (i.e. of the form 1...10....0).
2600 */
2601 int
2602 checkmask(struct sockaddr *sa)
2603 {
2604 u_char *mask;
2605 int i, len;
2606
2607 if ((mask = sa_rawaddr(sa, &len)) == NULL)
2608 return (-1);
2609
2610 for (i = 0; i < len; i++)
2611 if (mask[i] != 0xff)
2612 break;
2613 if (i < len) {
2614 if (~mask[i] & (u_char)(~mask[i] + 1))
2615 return (-1);
2616 i++;
2617 }
2618 for (; i < len; i++)
2619 if (mask[i] != 0)
2620 return (-1);
2621 return (0);
2622 }
2623
2624 /*
2625 * Compare two sockaddrs according to a specified mask. Return zero if
2626 * `sa1' matches `sa2' when filtered by the netmask in `samask'.
2627 * If samask is NULL, perform a full comparision.
2628 */
2629 int
2630 sacmp(struct sockaddr *sa1, struct sockaddr *sa2, struct sockaddr *samask)
2631 {
2632 unsigned char *p1, *p2, *mask;
2633 int len, i;
2634
2635 if (sa1->sa_family != sa2->sa_family ||
2636 (p1 = sa_rawaddr(sa1, &len)) == NULL ||
2637 (p2 = sa_rawaddr(sa2, NULL)) == NULL)
2638 return (1);
2639
2640 switch (sa1->sa_family) {
2641 case AF_INET6:
2642 if (((struct sockaddr_in6 *)sa1)->sin6_scope_id !=
2643 ((struct sockaddr_in6 *)sa2)->sin6_scope_id)
2644 return (1);
2645 break;
2646 }
2647
2648 /* Simple binary comparison if no mask specified. */
2649 if (samask == NULL)
2650 return (memcmp(p1, p2, len));
2651
2652 /* Set up the mask, and do a mask-based comparison. */
2653 if (sa1->sa_family != samask->sa_family ||
2654 (mask = sa_rawaddr(samask, NULL)) == NULL)
2655 return (1);
2656
2657 for (i = 0; i < len; i++)
2658 if ((p1[i] & mask[i]) != (p2[i] & mask[i]))
2659 return (1);
2660 return (0);
2661 }
2662
2663 /*
2664 * Return a pointer to the part of the sockaddr that contains the
2665 * raw address, and set *nbytes to its length in bytes. Returns
2666 * NULL if the address family is unknown.
2667 */
2668 void *
2669 sa_rawaddr(struct sockaddr *sa, int *nbytes) {
2670 void *p;
2671 int len;
2672
2673 switch (sa->sa_family) {
2674 case AF_INET:
2675 len = sizeof(((struct sockaddr_in *)sa)->sin_addr);
2676 p = &((struct sockaddr_in *)sa)->sin_addr;
2677 break;
2678 case AF_INET6:
2679 len = sizeof(((struct sockaddr_in6 *)sa)->sin6_addr);
2680 p = &((struct sockaddr_in6 *)sa)->sin6_addr;
2681 break;
2682 default:
2683 p = NULL;
2684 len = 0;
2685 }
2686
2687 if (nbytes != NULL)
2688 *nbytes = len;
2689 return (p);
2690 }
2691
2692 void
2693 huphandler1(int sig)
2694 {
2695 got_sighup1 = 1;
2696 }
2697
2698 void
2699 huphandler2(int sig)
2700 {
2701 got_sighup2 = 1;
2702 }
2703
2704 void terminate(int sig)
2705 {
2706 pidfile_remove(pfh);
2707 rpcb_unset(RPCPROG_MNT, RPCMNT_VER1, NULL);
2708 rpcb_unset(RPCPROG_MNT, RPCMNT_VER3, NULL);
2709 exit (0);
2710 }
DragonFly BSD