mountd(8): Silence warnings.
[dragonfly.git] / sbin / mountd / mountd.c
CommitLineData
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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. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
1de703da
MD
35 *
36 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved.
37 * @(#)mountd.c 8.15 (Berkeley) 5/1/95
38 * $FreeBSD: src/sbin/mountd/mountd.c,v 1.39.2.5 2002/09/13 15:57:43 joerg Exp $
1aa89f17 39 * $DragonFly: src/sbin/mountd/mountd.c,v 1.9 2008/02/05 20:49:51 dillon Exp $
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40 */
41
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42#include <sys/param.h>
43#include <sys/mount.h>
1aa89f17 44#include <sys/mountctl.h>
ce0e08e2 45#include <sys/fcntl.h>
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46#include <sys/stat.h>
47#include <sys/syslog.h>
48#include <sys/sysctl.h>
49
50#include <rpc/rpc.h>
51#include <rpc/pmap_clnt.h>
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52#include <rpc/pmap_prot.h>
53#include <rpcsvc/mount.h>
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54#include <vfs/nfs/rpcv2.h>
55#include <vfs/nfs/nfsproto.h>
56#include <vfs/nfs/nfs.h>
57#include <vfs/ufs/ufsmount.h>
58#include <vfs/msdosfs/msdosfsmount.h>
59#include <vfs/ntfs/ntfsmount.h>
60#include <vfs/isofs/cd9660/cd9660_mount.h> /* XXX need isofs in include */
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61
62#include <arpa/inet.h>
63
64#include <ctype.h>
65#include <err.h>
66#include <errno.h>
67#include <grp.h>
68#include <netdb.h>
69#include <pwd.h>
70#include <signal.h>
71#include <stdio.h>
72#include <stdlib.h>
73#include <string.h>
74#include <unistd.h>
75#include "pathnames.h"
76
77#ifdef DEBUG
78#include <stdarg.h>
79#endif
80
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81#ifndef MOUNTDLOCK
82#define MOUNTDLOCK "/var/run/mountd.lock"
83#endif
84
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85/*
86 * Structures for keeping the mount list and export list
87 */
88struct mountlist {
89 struct mountlist *ml_next;
90 char ml_host[RPCMNT_NAMELEN+1];
91 char ml_dirp[RPCMNT_PATHLEN+1];
92};
93
94struct dirlist {
95 struct dirlist *dp_left;
96 struct dirlist *dp_right;
97 int dp_flag;
98 struct hostlist *dp_hosts; /* List of hosts this dir exported to */
99 char dp_dirp[1]; /* Actually malloc'd to size of dir */
100};
101/* dp_flag bits */
102#define DP_DEFSET 0x1
103#define DP_HOSTSET 0x2
104#define DP_KERB 0x4
105
106struct exportlist {
107 struct exportlist *ex_next;
108 struct dirlist *ex_dirl;
109 struct dirlist *ex_defdir;
110 int ex_flag;
111 fsid_t ex_fs;
112 char *ex_fsdir;
113 char *ex_indexfile;
114};
115/* ex_flag bits */
116#define EX_LINKED 0x1
117
118struct netmsk {
ce0e08e2 119 struct sockaddr_storage nt_net;
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120 u_int32_t nt_mask;
121 char *nt_name;
122};
123
124union grouptypes {
ce0e08e2 125 struct addrinfo *gt_addrinfo;
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126 struct netmsk gt_net;
127};
128
129struct grouplist {
130 int gr_type;
131 union grouptypes gr_ptr;
132 struct grouplist *gr_next;
133};
134/* Group types */
135#define GT_NULL 0x0
136#define GT_HOST 0x1
137#define GT_NET 0x2
ce0e08e2 138#define GT_DEFAULT 0x3
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139#define GT_IGNORE 0x5
140
141struct hostlist {
142 int ht_flag; /* Uses DP_xx bits */
143 struct grouplist *ht_grp;
144 struct hostlist *ht_next;
145};
146
147struct fhreturn {
148 int fhr_flag;
149 int fhr_vers;
150 nfsfh_t fhr_fh;
151};
152
153/* Global defs */
9a76cd75 154char *add_expdir(struct dirlist **, char *, int);
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EN
155void add_dlist(struct dirlist **, struct dirlist *,
156 struct grouplist *, int);
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DR
157void add_mlist(char *, char *);
158int check_dirpath(char *);
159int check_options(struct dirlist *);
ce0e08e2 160int chk_host(struct dirlist *, struct sockaddr *, int *, int *);
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DR
161void del_mlist(char *, char *);
162struct dirlist *dirp_search(struct dirlist *, char *);
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EN
163int do_mount(struct exportlist *, struct grouplist *, int,
164 struct ucred *, char *, int, struct statfs *);
165int do_opt(char **, char **, struct exportlist *, struct grouplist *,
166 int *, int *, struct ucred *);
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DR
167struct exportlist *ex_search(fsid_t *);
168struct exportlist *get_exp(void);
169void free_dir(struct dirlist *);
170void free_exp(struct exportlist *);
171void free_grp(struct grouplist *);
172void free_host(struct hostlist *);
173void get_exportlist(void);
174int get_host(char *, struct grouplist *, struct grouplist *);
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DR
175struct hostlist *get_ht(void);
176int get_line(void);
177void get_mountlist(void);
178int get_net(char *, struct netmsk *, int);
179void getexp_err(struct exportlist *, struct grouplist *);
180struct grouplist *get_grp(void);
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181void hang_dirp(struct dirlist *, struct grouplist *,
182 struct exportlist *, int);
ce0e08e2 183void huphandler(int sig);
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DR
184void mntsrv(struct svc_req *, SVCXPRT *);
185void nextfield(char **, char **);
186void out_of_mem(void);
187void parsecred(char *, struct ucred *);
188int put_exlist(struct dirlist *, XDR *, struct dirlist *, int *);
ce0e08e2 189int scan_tree(struct dirlist *, struct sockaddr *);
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DR
190static void usage(void);
191int xdr_dir(XDR *, char *);
192int xdr_explist(XDR *, caddr_t);
193int xdr_fhs(XDR *, caddr_t);
194int xdr_mlist(XDR *, caddr_t);
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PA
195void terminate(int);
196
197static int allones(struct sockaddr_storage *, int);
198static int bitcmp(void *, void *, int);
199static int countones(struct sockaddr *);
200static int netpartcmp(struct sockaddr *, struct sockaddr *, int);
201static int sacmp(struct sockaddr *, struct sockaddr *);
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202
203struct exportlist *exphead;
204struct mountlist *mlhead;
205struct grouplist *grphead;
206char exname[MAXPATHLEN];
207struct ucred def_anon = {
208 1,
209 (uid_t) -2,
210 1,
211 { (gid_t) -2 }
212};
213int force_v2 = 0;
214int resvport_only = 1;
215int dir_only = 1;
8af0d623 216int do_log = 0;
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217int got_sighup = 0;
218
984263bc 219int opt_flags;
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220static int have_v6 = 1;
221#ifdef NI_WITHSCOPEID
222static const int ninumeric = NI_NUMERICHOST | NI_WITHSCOPEID;
223#else
224static const int ninumeric = NI_NUMERICHOST;
225#endif
226
227int mountdlockfd;
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228/* Bits for above */
229#define OP_MAPROOT 0x01
230#define OP_MAPALL 0x02
231#define OP_KERB 0x04
232#define OP_MASK 0x08
233#define OP_NET 0x10
234#define OP_ALLDIRS 0x40
235/* 0x80 is OP_HAVEMASK in FreeBSD 5+ */
236#define OP_QUIET 0x100
ce0e08e2 237#define OP_MASKLEN 0x200
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238
239#ifdef DEBUG
240int debug = 1;
9a76cd75 241void SYSLOG(int, const char *, ...);
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242#define syslog SYSLOG
243#else
244int debug = 0;
245#endif
246
247/*
248 * Mountd server for NFS mount protocol as described in:
249 * NFS: Network File System Protocol Specification, RFC1094, Appendix A
250 * The optional arguments are the exports file name
251 * default: _PATH_EXPORTS
252 * and "-n" to allow nonroot mount.
253 */
254int
b5744197 255main(int argc, char **argv)
984263bc 256{
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PA
257 fd_set readfds;
258 SVCXPRT *udptransp, *tcptransp, *udp6transp, *tcp6transp;
259 struct netconfig *udpconf, *tcpconf, *udp6conf, *tcp6conf;
260 int udpsock, tcpsock, udp6sock, tcp6sock;
261 int xcreated = 0, s;
262 int one = 1;
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263 int c, error, mib[3];
264 struct vfsconf vfc;
265
ce0e08e2 266 udp6conf = tcp6conf = NULL;
1b0da553 267 udp6sock = tcp6sock = 0;
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PA
268
269 /* Check that another mountd isn't already running. */
270 if ((mountdlockfd = (open(MOUNTDLOCK, O_RDONLY|O_CREAT, 0444))) == -1)
271 err(1, "%s", MOUNTDLOCK);
272
273 if(flock(mountdlockfd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK)
274 errx(1, "another rpc.mountd is already running. Aborting");
275 s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
276 if (s < 0)
277 have_v6 = 0;
278 else
279 close(s);
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280 error = getvfsbyname("nfs", &vfc);
281 if (error && vfsisloadable("nfs")) {
282 if(vfsload("nfs"))
283 err(1, "vfsload(nfs)");
284 endvfsent(); /* flush cache */
285 error = getvfsbyname("nfs", &vfc);
286 }
287 if (error)
288 errx(1, "NFS support is not available in the running kernel");
289
290 while ((c = getopt(argc, argv, "2dlnr")) != -1)
291 switch (c) {
292 case '2':
293 force_v2 = 1;
294 break;
295 case 'n':
296 resvport_only = 0;
297 break;
298 case 'r':
299 dir_only = 0;
300 break;
301 case 'd':
302 debug = debug ? 0 : 1;
303 break;
304 case 'l':
8af0d623 305 do_log = 1;
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306 break;
307 default:
308 usage();
309 };
310 argc -= optind;
311 argv += optind;
312 grphead = (struct grouplist *)NULL;
313 exphead = (struct exportlist *)NULL;
314 mlhead = (struct mountlist *)NULL;
315 if (argc == 1) {
316 strncpy(exname, *argv, MAXPATHLEN-1);
317 exname[MAXPATHLEN-1] = '\0';
318 } else
319 strcpy(exname, _PATH_EXPORTS);
320 openlog("mountd", LOG_PID, LOG_DAEMON);
321 if (debug)
322 warnx("getting export list");
323 get_exportlist();
324 if (debug)
325 warnx("getting mount list");
326 get_mountlist();
327 if (debug)
328 warnx("here we go");
329 if (debug == 0) {
330 daemon(0, 0);
331 signal(SIGINT, SIG_IGN);
332 signal(SIGQUIT, SIG_IGN);
333 }
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PA
334 signal(SIGHUP, huphandler);
335 signal(SIGTERM, terminate);
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336 { FILE *pidfile = fopen(_PATH_MOUNTDPID, "w");
337 if (pidfile != NULL) {
338 fprintf(pidfile, "%d\n", getpid());
339 fclose(pidfile);
340 }
341 }
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PA
342 rpcb_unset(RPCPROG_MNT, RPCMNT_VER1, NULL);
343 rpcb_unset(RPCPROG_MNT, RPCMNT_VER3, NULL);
344 udpsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
345 tcpsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
346 udpconf = getnetconfigent("udp");
347 tcpconf = getnetconfigent("tcp");
348 if (!have_v6)
349 goto skip_v6;
350 udp6sock = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
351 tcp6sock = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP);
352 /*
353 * We're doing host-based access checks here, so don't allow
354 * v4-in-v6 to confuse things. The kernel will disable it
355 * by default on NFS sockets too.
356 */
357 if (udp6sock != -1 && setsockopt(udp6sock, IPPROTO_IPV6,
358 IPV6_BINDV6ONLY, &one, sizeof one) < 0){
359 syslog(LOG_ERR, "can't disable v4-in-v6 on UDP socket");
360 exit(1);
361 }
362 if (tcp6sock != -1 && setsockopt(tcp6sock, IPPROTO_IPV6,
363 IPV6_BINDV6ONLY, &one, sizeof one) < 0){
364 syslog(LOG_ERR, "can't disable v4-in-v6 on UDP socket");
365 exit(1);
366 }
367 udp6conf = getnetconfigent("udp6");
368 tcp6conf = getnetconfigent("tcp6");
369
370skip_v6:
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MD
371 if (!resvport_only) {
372 mib[0] = CTL_VFS;
373 mib[1] = vfc.vfc_typenum;
374 mib[2] = NFS_NFSPRIVPORT;
375 if (sysctl(mib, 3, NULL, NULL, &resvport_only,
376 sizeof(resvport_only)) != 0 && errno != ENOENT) {
377 syslog(LOG_ERR, "sysctl: %m");
378 exit(1);
379 }
380 }
381 if ((udptransp = svcudp_create(RPC_ANYSOCK)) == NULL ||
382 (tcptransp = svctcp_create(RPC_ANYSOCK, 0, 0)) == NULL) {
383 syslog(LOG_ERR, "can't create socket");
384 exit(1);
385 }
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PA
386 if (udpsock != -1 && udpconf != NULL) {
387 bindresvport(udpsock, NULL);
388 udptransp = svc_dg_create(udpsock, 0, 0);
389 if (udptransp != NULL) {
390 if (!svc_reg(udptransp, RPCPROG_MNT, RPCMNT_VER1,
391 mntsrv, udpconf))
392 syslog(LOG_WARNING, "can't register UDP RPCMNT_VER1 service");
393 else
394 xcreated++;
395 if (!force_v2) {
396 if (!svc_reg(udptransp, RPCPROG_MNT, RPCMNT_VER3,
397 mntsrv, udpconf))
398 syslog(LOG_WARNING, "can't register UDP RPCMNT_VER3 service");
399 else
400 xcreated++;
401 }
402 } else
403 syslog(LOG_WARNING, "can't create UDP services");
404
405 }
406 if (tcpsock != -1 && tcpconf != NULL) {
407 bindresvport(tcpsock, NULL);
408 listen(tcpsock, SOMAXCONN);
409 tcptransp = svc_vc_create(tcpsock, 0, 0);
410 if (tcptransp != NULL) {
411 if (!svc_reg(tcptransp, RPCPROG_MNT, RPCMNT_VER1,
412 mntsrv, tcpconf))
413 syslog(LOG_WARNING, "can't register TCP RPCMNT_VER1 service");
414 else
415 xcreated++;
416 if (!force_v2) {
417 if (!svc_reg(tcptransp, RPCPROG_MNT, RPCMNT_VER3,
418 mntsrv, tcpconf))
419 syslog(LOG_WARNING, "can't register TCP RPCMNT_VER3 service");
420 else
421 xcreated++;
422 }
423 } else
424 syslog(LOG_WARNING, "can't create TCP service");
425
426 }
427 if (have_v6 && udp6sock != -1 && udp6conf != NULL) {
428 bindresvport(udp6sock, NULL);
429 udp6transp = svc_dg_create(udp6sock, 0, 0);
430 if (udp6transp != NULL) {
431 if (!svc_reg(udp6transp, RPCPROG_MNT, RPCMNT_VER1,
432 mntsrv, udp6conf))
433 syslog(LOG_WARNING, "can't register UDP6 RPCMNT_VER1 service");
434 else
435 xcreated++;
436 if (!force_v2) {
437 if (!svc_reg(udp6transp, RPCPROG_MNT, RPCMNT_VER3,
438 mntsrv, udp6conf))
439 syslog(LOG_WARNING, "can't register UDP6 RPCMNT_VER3 service");
440 else
441 xcreated++;
442 }
443 } else
444 syslog(LOG_WARNING, "can't create UDP6 service");
445
446 }
447 if (have_v6 && tcp6sock != -1 && tcp6conf != NULL) {
448 bindresvport(tcp6sock, NULL);
449 listen(tcp6sock, SOMAXCONN);
450 tcp6transp = svc_vc_create(tcp6sock, 0, 0);
451 if (tcp6transp != NULL) {
452 if (!svc_reg(tcp6transp, RPCPROG_MNT, RPCMNT_VER1,
453 mntsrv, tcp6conf))
454 syslog(LOG_WARNING, "can't register TCP6 RPCMNT_VER1 service");
455 else
456 xcreated++;
457 if (!force_v2) {
458 if (!svc_reg(tcp6transp, RPCPROG_MNT, RPCMNT_VER3,
459 mntsrv, tcp6conf))
460 syslog(LOG_WARNING, "can't register TCP6 RPCMNT_VER3 service");
461 else
462 xcreated++;
463 }
464 } else
465 syslog(LOG_WARNING, "can't create TCP6 service");
466
467 }
468 if (xcreated == 0) {
469 syslog(LOG_ERR, "could not create any services");
470 exit(1);
471 }
472
473 /* Expand svc_run() here so that we can call get_exportlist(). */
474 for (;;) {
475 if (got_sighup) {
476 get_exportlist();
477 got_sighup = 0;
478 }
479 readfds = svc_fdset;
480 switch (select(svc_maxfd + 1, &readfds, NULL, NULL, NULL)) {
481 case -1:
482 if (errno == EINTR)
483 continue;
484 syslog(LOG_ERR, "mountd died: select: %m");
984263bc 485 exit(1);
ce0e08e2
PA
486 case 0:
487 continue;
488 default:
489 svc_getreqset(&readfds);
984263bc 490 }
984263bc 491 }
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MD
492}
493
494static void
b5744197 495usage(void)
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MD
496{
497 fprintf(stderr,
498 "usage: mountd [-2] [-d] [-l] [-n] [-r] [export_file]\n");
499 exit(1);
500}
501
502/*
503 * The mount rpc service
504 */
505void
b5744197 506mntsrv(struct svc_req *rqstp, SVCXPRT *transp)
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507{
508 struct exportlist *ep;
509 struct dirlist *dp;
510 struct fhreturn fhr;
511 struct stat stb;
512 struct statfs fsb;
ce0e08e2
PA
513 struct addrinfo *ai;
514 char host[NI_MAXHOST], numerichost[NI_MAXHOST];
515 int lookup_failed = 1;
516 struct sockaddr *saddr;
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MD
517 u_short sport;
518 char rpcpath[RPCMNT_PATHLEN + 1], dirpath[MAXPATHLEN];
519 int bad = 0, defset, hostset;
520 sigset_t sighup_mask;
521
522 sigemptyset(&sighup_mask);
523 sigaddset(&sighup_mask, SIGHUP);
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PA
524 saddr = svc_getrpccaller(transp)->buf;
525 switch (saddr->sa_family) {
526 case AF_INET6:
527 sport = ntohs(((struct sockaddr_in6 *)saddr)->sin6_port);
528 break;
529 case AF_INET:
530 sport = ntohs(((struct sockaddr_in *)saddr)->sin_port);
531 break;
532 default:
533 syslog(LOG_ERR, "request from unknown address family");
534 return;
535 }
536 lookup_failed = getnameinfo(saddr, saddr->sa_len, host, sizeof host,
537 NULL, 0, 0);
538 getnameinfo(saddr, saddr->sa_len, numerichost,
539 sizeof numerichost, NULL, 0, NI_NUMERICHOST);
540 ai = NULL;
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MD
541 switch (rqstp->rq_proc) {
542 case NULLPROC:
1b0da553 543 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL))
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MD
544 syslog(LOG_ERR, "can't send reply");
545 return;
546 case RPCMNT_MOUNT:
547 if (sport >= IPPORT_RESERVED && resvport_only) {
548 syslog(LOG_NOTICE,
549 "mount request from %s from unprivileged port",
ce0e08e2 550 numerichost);
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MD
551 svcerr_weakauth(transp);
552 return;
553 }
1b0da553 554 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) {
984263bc 555 syslog(LOG_NOTICE, "undecodable mount request from %s",
ce0e08e2 556 numerichost);
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MD
557 svcerr_decode(transp);
558 return;
559 }
560
561 /*
562 * Get the real pathname and make sure it is a directory
563 * or a regular file if the -r option was specified
564 * and it exists.
565 */
566 if (realpath(rpcpath, dirpath) == NULL ||
567 stat(dirpath, &stb) < 0 ||
568 (!S_ISDIR(stb.st_mode) &&
ce0e08e2 569 (dir_only || !S_ISREG(stb.st_mode))) ||
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MD
570 statfs(dirpath, &fsb) < 0) {
571 chdir("/"); /* Just in case realpath doesn't */
572 syslog(LOG_NOTICE,
573 "mount request from %s for non existent path %s",
ce0e08e2 574 numerichost, dirpath);
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MD
575 if (debug)
576 warnx("stat failed on %s", dirpath);
577 bad = ENOENT; /* We will send error reply later */
578 }
579
580 /* Check in the exports list */
581 sigprocmask(SIG_BLOCK, &sighup_mask, NULL);
582 ep = ex_search(&fsb.f_fsid);
583 hostset = defset = 0;
584 if (ep && (chk_host(ep->ex_defdir, saddr, &defset, &hostset) ||
585 ((dp = dirp_search(ep->ex_dirl, dirpath)) &&
ce0e08e2
PA
586 chk_host(dp, saddr, &defset, &hostset)) ||
587 (defset && scan_tree(ep->ex_defdir, saddr) == 0 &&
588 scan_tree(ep->ex_dirl, saddr) == 0))) {
984263bc 589 if (bad) {
1b0da553
SW
590 if (!svc_sendreply(transp, (xdrproc_t)xdr_long,
591 &bad))
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MD
592 syslog(LOG_ERR, "can't send reply");
593 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
594 return;
595 }
596 if (hostset & DP_HOSTSET)
597 fhr.fhr_flag = hostset;
598 else
599 fhr.fhr_flag = defset;
600 fhr.fhr_vers = rqstp->rq_vers;
601 /* Get the file handle */
602 memset(&fhr.fhr_fh, 0, sizeof(nfsfh_t));
603 if (getfh(dirpath, (fhandle_t *)&fhr.fhr_fh) < 0) {
604 bad = errno;
605 syslog(LOG_ERR, "can't get fh for %s", dirpath);
1b0da553
SW
606 if (!svc_sendreply(transp, (xdrproc_t)xdr_long,
607 &bad))
984263bc
MD
608 syslog(LOG_ERR, "can't send reply");
609 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
610 return;
611 }
1b0da553 612 if (!svc_sendreply(transp, (xdrproc_t)xdr_fhs, &fhr))
984263bc 613 syslog(LOG_ERR, "can't send reply");
ce0e08e2
PA
614 if (!lookup_failed)
615 add_mlist(host, dirpath);
984263bc 616 else
ce0e08e2 617 add_mlist(numerichost, dirpath);
984263bc
MD
618 if (debug)
619 warnx("mount successful");
8af0d623 620 if (do_log)
984263bc
MD
621 syslog(LOG_NOTICE,
622 "mount request succeeded from %s for %s",
ce0e08e2 623 numerichost, dirpath);
984263bc
MD
624 } else {
625 bad = EACCES;
626 syslog(LOG_NOTICE,
627 "mount request denied from %s for %s",
ce0e08e2 628 numerichost, dirpath);
984263bc
MD
629 }
630
1b0da553 631 if (bad && !svc_sendreply(transp, (xdrproc_t)xdr_long, &bad))
984263bc
MD
632 syslog(LOG_ERR, "can't send reply");
633 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
634 return;
635 case RPCMNT_DUMP:
1b0da553 636 if (!svc_sendreply(transp, (xdrproc_t)xdr_mlist, NULL))
984263bc 637 syslog(LOG_ERR, "can't send reply");
8af0d623 638 else if (do_log)
984263bc
MD
639 syslog(LOG_NOTICE,
640 "dump request succeeded from %s",
ce0e08e2 641 numerichost);
984263bc
MD
642 return;
643 case RPCMNT_UMOUNT:
644 if (sport >= IPPORT_RESERVED && resvport_only) {
645 syslog(LOG_NOTICE,
646 "umount request from %s from unprivileged port",
ce0e08e2 647 numerichost);
984263bc
MD
648 svcerr_weakauth(transp);
649 return;
650 }
1b0da553 651 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) {
984263bc 652 syslog(LOG_NOTICE, "undecodable umount request from %s",
ce0e08e2 653 numerichost);
984263bc
MD
654 svcerr_decode(transp);
655 return;
656 }
657 if (realpath(rpcpath, dirpath) == NULL) {
658 syslog(LOG_NOTICE, "umount request from %s "
659 "for non existent path %s",
ce0e08e2 660 numerichost, dirpath);
984263bc 661 }
1b0da553 662 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL))
984263bc 663 syslog(LOG_ERR, "can't send reply");
ce0e08e2
PA
664 if (!lookup_failed)
665 del_mlist(host, dirpath);
666 del_mlist(numerichost, dirpath);
8af0d623 667 if (do_log)
984263bc
MD
668 syslog(LOG_NOTICE,
669 "umount request succeeded from %s for %s",
ce0e08e2 670 numerichost, dirpath);
984263bc
MD
671 return;
672 case RPCMNT_UMNTALL:
673 if (sport >= IPPORT_RESERVED && resvport_only) {
674 syslog(LOG_NOTICE,
675 "umountall request from %s from unprivileged port",
ce0e08e2 676 numerichost);
984263bc
MD
677 svcerr_weakauth(transp);
678 return;
679 }
1b0da553 680 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL))
984263bc 681 syslog(LOG_ERR, "can't send reply");
ce0e08e2
PA
682 if (!lookup_failed)
683 del_mlist(host, NULL);
684 del_mlist(numerichost, NULL);
8af0d623 685 if (do_log)
984263bc
MD
686 syslog(LOG_NOTICE,
687 "umountall request succeeded from %s",
ce0e08e2 688 numerichost);
984263bc
MD
689 return;
690 case RPCMNT_EXPORT:
1b0da553 691 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist, NULL))
984263bc 692 syslog(LOG_ERR, "can't send reply");
8af0d623 693 if (do_log)
984263bc
MD
694 syslog(LOG_NOTICE,
695 "export request succeeded from %s",
ce0e08e2 696 numerichost);
984263bc
MD
697 return;
698 default:
699 svcerr_noproc(transp);
700 return;
701 }
702}
703
704/*
705 * Xdr conversion for a dirpath string
706 */
707int
b5744197 708xdr_dir(XDR *xdrsp, char *dirp)
984263bc
MD
709{
710 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
711}
712
713/*
714 * Xdr routine to generate file handle reply
715 */
716int
b5744197 717xdr_fhs(XDR *xdrsp, caddr_t cp)
984263bc 718{
af62a082 719 struct fhreturn *fhrp = (struct fhreturn *)cp;
984263bc
MD
720 u_long ok = 0, len, auth;
721
722 if (!xdr_long(xdrsp, &ok))
723 return (0);
724 switch (fhrp->fhr_vers) {
725 case 1:
726 return (xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, NFSX_V2FH));
727 case 3:
728 len = NFSX_V3FH;
729 if (!xdr_long(xdrsp, &len))
730 return (0);
731 if (!xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, len))
732 return (0);
733 if (fhrp->fhr_flag & DP_KERB)
734 auth = RPCAUTH_KERB4;
735 else
736 auth = RPCAUTH_UNIX;
737 len = 1;
738 if (!xdr_long(xdrsp, &len))
739 return (0);
740 return (xdr_long(xdrsp, &auth));
741 };
742 return (0);
743}
744
745int
b5744197 746xdr_mlist(XDR *xdrsp, caddr_t cp)
984263bc
MD
747{
748 struct mountlist *mlp;
749 int true = 1;
750 int false = 0;
751 char *strp;
752
753 mlp = mlhead;
754 while (mlp) {
755 if (!xdr_bool(xdrsp, &true))
756 return (0);
757 strp = &mlp->ml_host[0];
758 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
759 return (0);
760 strp = &mlp->ml_dirp[0];
761 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
762 return (0);
763 mlp = mlp->ml_next;
764 }
765 if (!xdr_bool(xdrsp, &false))
766 return (0);
767 return (1);
768}
769
770/*
771 * Xdr conversion for export list
772 */
773int
b5744197 774xdr_explist(XDR *xdrsp, caddr_t cp)
984263bc
MD
775{
776 struct exportlist *ep;
777 int false = 0;
778 int putdef;
779 sigset_t sighup_mask;
780
781 sigemptyset(&sighup_mask);
782 sigaddset(&sighup_mask, SIGHUP);
783 sigprocmask(SIG_BLOCK, &sighup_mask, NULL);
784 ep = exphead;
785 while (ep) {
786 putdef = 0;
787 if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir, &putdef))
788 goto errout;
789 if (ep->ex_defdir && putdef == 0 &&
790 put_exlist(ep->ex_defdir, xdrsp, (struct dirlist *)NULL,
791 &putdef))
792 goto errout;
793 ep = ep->ex_next;
794 }
795 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
796 if (!xdr_bool(xdrsp, &false))
797 return (0);
798 return (1);
799errout:
800 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
801 return (0);
802}
803
804/*
805 * Called from xdr_explist() to traverse the tree and export the
806 * directory paths.
807 */
808int
b5744197 809put_exlist(struct dirlist *dp, XDR *xdrsp, struct dirlist *adp, int *putdefp)
984263bc
MD
810{
811 struct grouplist *grp;
812 struct hostlist *hp;
813 int true = 1;
814 int false = 0;
815 int gotalldir = 0;
816 char *strp;
817
818 if (dp) {
819 if (put_exlist(dp->dp_left, xdrsp, adp, putdefp))
820 return (1);
821 if (!xdr_bool(xdrsp, &true))
822 return (1);
823 strp = dp->dp_dirp;
824 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
825 return (1);
826 if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) {
827 gotalldir = 1;
828 *putdefp = 1;
829 }
830 if ((dp->dp_flag & DP_DEFSET) == 0 &&
831 (gotalldir == 0 || (adp->dp_flag & DP_DEFSET) == 0)) {
832 hp = dp->dp_hosts;
833 while (hp) {
834 grp = hp->ht_grp;
835 if (grp->gr_type == GT_HOST) {
836 if (!xdr_bool(xdrsp, &true))
837 return (1);
ce0e08e2 838 strp = grp->gr_ptr.gt_addrinfo->ai_canonname;
984263bc
MD
839 if (!xdr_string(xdrsp, &strp,
840 RPCMNT_NAMELEN))
841 return (1);
842 } else if (grp->gr_type == GT_NET) {
843 if (!xdr_bool(xdrsp, &true))
844 return (1);
845 strp = grp->gr_ptr.gt_net.nt_name;
846 if (!xdr_string(xdrsp, &strp,
847 RPCMNT_NAMELEN))
848 return (1);
849 }
850 hp = hp->ht_next;
851 if (gotalldir && hp == (struct hostlist *)NULL) {
852 hp = adp->dp_hosts;
853 gotalldir = 0;
854 }
855 }
856 }
857 if (!xdr_bool(xdrsp, &false))
858 return (1);
859 if (put_exlist(dp->dp_right, xdrsp, adp, putdefp))
860 return (1);
861 }
862 return (0);
863}
864
865#define LINESIZ 10240
866char line[LINESIZ];
867FILE *exp_file;
868
869/*
870 * Get the export list
871 */
872void
b5744197 873get_exportlist(void)
984263bc
MD
874{
875 struct exportlist *ep, *ep2;
876 struct grouplist *grp, *tgrp;
877 struct exportlist **epp;
878 struct dirlist *dirhead;
879 struct statfs fsb, *fsp;
984263bc
MD
880 struct ucred anon;
881 char *cp, *endcp, *dirp, *hst, *usr, *dom, savedc;
882 int len, has_host, exflags, got_nondir, dirplen, num, i, netgrp;
883
884 dirp = NULL;
885 dirplen = 0;
886
887 /*
888 * First, get rid of the old list
889 */
890 ep = exphead;
891 while (ep) {
892 ep2 = ep;
893 ep = ep->ex_next;
894 free_exp(ep2);
895 }
896 exphead = (struct exportlist *)NULL;
897
898 grp = grphead;
899 while (grp) {
900 tgrp = grp;
901 grp = grp->gr_next;
902 free_grp(tgrp);
903 }
904 grphead = (struct grouplist *)NULL;
905
906 /*
907 * And delete exports that are in the kernel for all local
908 * file systems.
909 * XXX: Should know how to handle all local exportable file systems
910 * instead of just "ufs".
911 */
912 num = getmntinfo(&fsp, MNT_NOWAIT);
913 for (i = 0; i < num; i++) {
914 union {
915 struct ufs_args ua;
916 struct iso_args ia;
917 struct mfs_args ma;
918 struct msdosfs_args da;
919 struct ntfs_args na;
920 } targs;
1aa89f17 921 struct export_args export;
984263bc 922
1aa89f17
MD
923 export.ex_flags = MNT_DELEXPORT;
924 if (mountctl(fsp->f_mntonname, MOUNTCTL_SET_EXPORT, -1,
925 &export, sizeof(export), NULL, 0) == 0) {
926 } else if (!strcmp(fsp->f_fstypename, "mfs") ||
984263bc
MD
927 !strcmp(fsp->f_fstypename, "ufs") ||
928 !strcmp(fsp->f_fstypename, "msdos") ||
929 !strcmp(fsp->f_fstypename, "ntfs") ||
930 !strcmp(fsp->f_fstypename, "cd9660")) {
931 targs.ua.fspec = NULL;
932 targs.ua.export.ex_flags = MNT_DELEXPORT;
933 if (mount(fsp->f_fstypename, fsp->f_mntonname,
934 fsp->f_flags | MNT_UPDATE,
935 (caddr_t)&targs) < 0)
936 syslog(LOG_ERR, "can't delete exports for %s",
ce0e08e2 937 fsp->f_mntonname);
984263bc
MD
938 }
939 fsp++;
940 }
941
942 /*
943 * Read in the exports file and build the list, calling
944 * mount() as we go along to push the export rules into the kernel.
945 */
946 if ((exp_file = fopen(exname, "r")) == NULL) {
947 syslog(LOG_ERR, "can't open %s", exname);
948 exit(2);
949 }
950 dirhead = (struct dirlist *)NULL;
951 while (get_line()) {
952 if (debug)
953 warnx("got line %s", line);
954 cp = line;
955 nextfield(&cp, &endcp);
956 if (*cp == '#')
957 goto nextline;
958
959 /*
960 * Set defaults.
961 */
962 has_host = FALSE;
963 anon = def_anon;
964 exflags = MNT_EXPORTED;
965 got_nondir = 0;
966 opt_flags = 0;
967 ep = (struct exportlist *)NULL;
968
969 /*
970 * Create new exports list entry
971 */
972 len = endcp-cp;
973 tgrp = grp = get_grp();
974 while (len > 0) {
975 if (len > RPCMNT_NAMELEN) {
976 getexp_err(ep, tgrp);
977 goto nextline;
978 }
979 if (*cp == '-') {
980 if (ep == (struct exportlist *)NULL) {
981 getexp_err(ep, tgrp);
982 goto nextline;
983 }
984 if (debug)
985 warnx("doing opt %s", cp);
986 got_nondir = 1;
987 if (do_opt(&cp, &endcp, ep, grp, &has_host,
988 &exflags, &anon)) {
989 getexp_err(ep, tgrp);
990 goto nextline;
991 }
992 } else if (*cp == '/') {
993 savedc = *endcp;
994 *endcp = '\0';
995 if (check_dirpath(cp) &&
996 statfs(cp, &fsb) >= 0) {
997 if (got_nondir) {
998 syslog(LOG_ERR, "dirs must be first");
999 getexp_err(ep, tgrp);
1000 goto nextline;
1001 }
1002 if (ep) {
1003 if (ep->ex_fs.val[0] != fsb.f_fsid.val[0] ||
1004 ep->ex_fs.val[1] != fsb.f_fsid.val[1]) {
1005 getexp_err(ep, tgrp);
1006 goto nextline;
1007 }
1008 } else {
1009 /*
1010 * See if this directory is already
1011 * in the list.
1012 */
1013 ep = ex_search(&fsb.f_fsid);
1014 if (ep == (struct exportlist *)NULL) {
1015 ep = get_exp();
1016 ep->ex_fs = fsb.f_fsid;
1017 ep->ex_fsdir = (char *)
1018 malloc(strlen(fsb.f_mntonname) + 1);
1019 if (ep->ex_fsdir)
1020 strcpy(ep->ex_fsdir,
1021 fsb.f_mntonname);
1022 else
1023 out_of_mem();
1024 if (debug)
ce0e08e2
PA
1025 warnx("making new ep fs=0x%x,0x%x",
1026 fsb.f_fsid.val[0],
1027 fsb.f_fsid.val[1]);
984263bc
MD
1028 } else if (debug)
1029 warnx("found ep fs=0x%x,0x%x",
1030 fsb.f_fsid.val[0],
1031 fsb.f_fsid.val[1]);
1032 }
1033
1034 /*
1035 * Add dirpath to export mount point.
1036 */
1037 dirp = add_expdir(&dirhead, cp, len);
1038 dirplen = len;
1039 } else {
1040 getexp_err(ep, tgrp);
1041 goto nextline;
1042 }
1043 *endcp = savedc;
1044 } else {
1045 savedc = *endcp;
1046 *endcp = '\0';
1047 got_nondir = 1;
1048 if (ep == (struct exportlist *)NULL) {
1049 getexp_err(ep, tgrp);
1050 goto nextline;
1051 }
1052
1053 /*
1054 * Get the host or netgroup.
1055 */
1056 setnetgrent(cp);
1057 netgrp = getnetgrent(&hst, &usr, &dom);
1058 do {
1059 if (has_host) {
1060 grp->gr_next = get_grp();
1061 grp = grp->gr_next;
1062 }
1063 if (netgrp) {
1064 if (hst == 0) {
1065 syslog(LOG_ERR,
1066 "null hostname in netgroup %s, skipping", cp);
1067 grp->gr_type = GT_IGNORE;
1068 } else if (get_host(hst, grp, tgrp)) {
1069 syslog(LOG_ERR,
1070 "bad host %s in netgroup %s, skipping", hst, cp);
1071 grp->gr_type = GT_IGNORE;
1072 }
1073 } else if (get_host(cp, grp, tgrp)) {
1074 syslog(LOG_ERR, "bad host %s, skipping", cp);
1075 grp->gr_type = GT_IGNORE;
1076 }
1077 has_host = TRUE;
1078 } while (netgrp && getnetgrent(&hst, &usr, &dom));
1079 endnetgrent();
1080 *endcp = savedc;
1081 }
1082 cp = endcp;
1083 nextfield(&cp, &endcp);
1084 len = endcp - cp;
1085 }
1086 if (check_options(dirhead)) {
1087 getexp_err(ep, tgrp);
1088 goto nextline;
1089 }
1090 if (!has_host) {
ce0e08e2 1091 grp->gr_type = GT_DEFAULT;
984263bc
MD
1092 if (debug)
1093 warnx("adding a default entry");
984263bc
MD
1094
1095 /*
1096 * Don't allow a network export coincide with a list of
1097 * host(s) on the same line.
1098 */
1099 } else if ((opt_flags & OP_NET) && tgrp->gr_next) {
1100 getexp_err(ep, tgrp);
1101 goto nextline;
1102
ce0e08e2
PA
1103 /*
1104 * If an export list was specified on this line, make sure
984263bc
MD
1105 * that we have at least one valid entry, otherwise skip it.
1106 */
1107 } else {
1108 grp = tgrp;
ce0e08e2 1109 while (grp && grp->gr_type == GT_IGNORE)
984263bc
MD
1110 grp = grp->gr_next;
1111 if (! grp) {
1112 getexp_err(ep, tgrp);
1113 goto nextline;
1114 }
1115 }
1116
1117 /*
1118 * Loop through hosts, pushing the exports into the kernel.
1119 * After loop, tgrp points to the start of the list and
1120 * grp points to the last entry in the list.
1121 */
1122 grp = tgrp;
1123 do {
ce0e08e2
PA
1124 if (do_mount(ep, grp, exflags, &anon, dirp, dirplen,
1125 &fsb)) {
1126 getexp_err(ep, tgrp);
1127 goto nextline;
1128 }
984263bc
MD
1129 } while (grp->gr_next && (grp = grp->gr_next));
1130
1131 /*
1132 * Success. Update the data structures.
1133 */
1134 if (has_host) {
1135 hang_dirp(dirhead, tgrp, ep, opt_flags);
1136 grp->gr_next = grphead;
1137 grphead = tgrp;
1138 } else {
1139 hang_dirp(dirhead, (struct grouplist *)NULL, ep,
1140 opt_flags);
1141 free_grp(grp);
1142 }
1143 dirhead = (struct dirlist *)NULL;
1144 if ((ep->ex_flag & EX_LINKED) == 0) {
1145 ep2 = exphead;
1146 epp = &exphead;
1147
1148 /*
1149 * Insert in the list in alphabetical order.
1150 */
1151 while (ep2 && strcmp(ep2->ex_fsdir, ep->ex_fsdir) < 0) {
1152 epp = &ep2->ex_next;
1153 ep2 = ep2->ex_next;
1154 }
1155 if (ep2)
1156 ep->ex_next = ep2;
1157 *epp = ep;
1158 ep->ex_flag |= EX_LINKED;
1159 }
1160nextline:
1161 if (dirhead) {
1162 free_dir(dirhead);
1163 dirhead = (struct dirlist *)NULL;
1164 }
1165 }
1166 fclose(exp_file);
1167}
1168
1169/*
1170 * Allocate an export list element
1171 */
1172struct exportlist *
b5744197 1173get_exp(void)
984263bc
MD
1174{
1175 struct exportlist *ep;
1176
1177 ep = (struct exportlist *)malloc(sizeof (struct exportlist));
1178 if (ep == (struct exportlist *)NULL)
1179 out_of_mem();
1180 memset(ep, 0, sizeof(struct exportlist));
1181 return (ep);
1182}
1183
1184/*
1185 * Allocate a group list element
1186 */
1187struct grouplist *
b5744197 1188get_grp(void)
984263bc
MD
1189{
1190 struct grouplist *gp;
1191
1192 gp = (struct grouplist *)malloc(sizeof (struct grouplist));
1193 if (gp == (struct grouplist *)NULL)
1194 out_of_mem();
1195 memset(gp, 0, sizeof(struct grouplist));
1196 return (gp);
1197}
1198
1199/*
1200 * Clean up upon an error in get_exportlist().
1201 */
1202void
b5744197 1203getexp_err(struct exportlist *ep, struct grouplist *grp)
984263bc
MD
1204{
1205 struct grouplist *tgrp;
1206
1207 if (!(opt_flags & OP_QUIET))
1208 syslog(LOG_ERR, "bad exports list line %s", line);
1209 if (ep && (ep->ex_flag & EX_LINKED) == 0)
1210 free_exp(ep);
1211 while (grp) {
1212 tgrp = grp;
1213 grp = grp->gr_next;
1214 free_grp(tgrp);
1215 }
1216}
1217
1218/*
1219 * Search the export list for a matching fs.
1220 */
1221struct exportlist *
b5744197 1222ex_search(fsid_t *fsid)
984263bc
MD
1223{
1224 struct exportlist *ep;
1225
1226 ep = exphead;
1227 while (ep) {
1228 if (ep->ex_fs.val[0] == fsid->val[0] &&
1229 ep->ex_fs.val[1] == fsid->val[1])
1230 return (ep);
1231 ep = ep->ex_next;
1232 }
1233 return (ep);
1234}
1235
1236/*
1237 * Add a directory path to the list.
1238 */
1239char *
b5744197 1240add_expdir(struct dirlist **dpp, char *cp, int len)
984263bc
MD
1241{
1242 struct dirlist *dp;
1243
1244 dp = (struct dirlist *)malloc(sizeof (struct dirlist) + len);
1245 if (dp == (struct dirlist *)NULL)
1246 out_of_mem();
1247 dp->dp_left = *dpp;
1248 dp->dp_right = (struct dirlist *)NULL;
1249 dp->dp_flag = 0;
1250 dp->dp_hosts = (struct hostlist *)NULL;
1251 strcpy(dp->dp_dirp, cp);
1252 *dpp = dp;
1253 return (dp->dp_dirp);
1254}
1255
1256/*
1257 * Hang the dir list element off the dirpath binary tree as required
1258 * and update the entry for host.
1259 */
1260void
b5744197
HP
1261hang_dirp(struct dirlist *dp, struct grouplist *grp, struct exportlist *ep,
1262 int flags)
984263bc
MD
1263{
1264 struct hostlist *hp;
1265 struct dirlist *dp2;
1266
1267 if (flags & OP_ALLDIRS) {
1268 if (ep->ex_defdir)
1269 free((caddr_t)dp);
1270 else
1271 ep->ex_defdir = dp;
1272 if (grp == (struct grouplist *)NULL) {
1273 ep->ex_defdir->dp_flag |= DP_DEFSET;
1274 if (flags & OP_KERB)
1275 ep->ex_defdir->dp_flag |= DP_KERB;
1276 } else while (grp) {
1277 hp = get_ht();
1278 if (flags & OP_KERB)
1279 hp->ht_flag |= DP_KERB;
1280 hp->ht_grp = grp;
1281 hp->ht_next = ep->ex_defdir->dp_hosts;
1282 ep->ex_defdir->dp_hosts = hp;
1283 grp = grp->gr_next;
1284 }
1285 } else {
1286
1287 /*
1288 * Loop through the directories adding them to the tree.
1289 */
1290 while (dp) {
1291 dp2 = dp->dp_left;
1292 add_dlist(&ep->ex_dirl, dp, grp, flags);
1293 dp = dp2;
1294 }
1295 }
1296}
1297
1298/*
1299 * Traverse the binary tree either updating a node that is already there
1300 * for the new directory or adding the new node.
1301 */
1302void
b5744197
HP
1303add_dlist(struct dirlist **dpp, struct dirlist *newdp, struct grouplist *grp,
1304 int flags)
984263bc
MD
1305{
1306 struct dirlist *dp;
1307 struct hostlist *hp;
1308 int cmp;
1309
1310 dp = *dpp;
1311 if (dp) {
1312 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp);
1313 if (cmp > 0) {
1314 add_dlist(&dp->dp_left, newdp, grp, flags);
1315 return;
1316 } else if (cmp < 0) {
1317 add_dlist(&dp->dp_right, newdp, grp, flags);
1318 return;
1319 } else
1320 free((caddr_t)newdp);
1321 } else {
1322 dp = newdp;
1323 dp->dp_left = (struct dirlist *)NULL;
1324 *dpp = dp;
1325 }
1326 if (grp) {
1327
1328 /*
1329 * Hang all of the host(s) off of the directory point.
1330 */
1331 do {
1332 hp = get_ht();
1333 if (flags & OP_KERB)
1334 hp->ht_flag |= DP_KERB;
1335 hp->ht_grp = grp;
1336 hp->ht_next = dp->dp_hosts;
1337 dp->dp_hosts = hp;
1338 grp = grp->gr_next;
1339 } while (grp);
1340 } else {
1341 dp->dp_flag |= DP_DEFSET;
1342 if (flags & OP_KERB)
1343 dp->dp_flag |= DP_KERB;
1344 }
1345}
1346
1347/*
1348 * Search for a dirpath on the export point.
1349 */
1350struct dirlist *
ce0e08e2 1351dirp_search(struct dirlist *dp, char *dirp)
984263bc
MD
1352{
1353 int cmp;
1354
1355 if (dp) {
ce0e08e2 1356 cmp = strcmp(dp->dp_dirp, dirp);
984263bc 1357 if (cmp > 0)
ce0e08e2 1358 return (dirp_search(dp->dp_left, dirp));
984263bc 1359 else if (cmp < 0)
ce0e08e2 1360 return (dirp_search(dp->dp_right, dirp));
984263bc
MD
1361 else
1362 return (dp);
1363 }
1364 return (dp);
1365}
1366
1367/*
ce0e08e2
PA
1368 * Some helper functions for netmasks. They all assume masks in network
1369 * order (big endian).
1370 */
1371static int
1372bitcmp(void *dst, void *src, int bitlen)
1373{
1374 int i;
1375 u_int8_t *p1 = dst, *p2 = src;
1376 u_int8_t bitmask;
1377 int bytelen, bitsleft;
1378
1379 bytelen = bitlen / 8;
1380 bitsleft = bitlen % 8;
1381
1382 if (debug) {
1383 printf("comparing:\n");
1384 for (i = 0; i < (bitsleft ? bytelen + 1 : bytelen); i++)
1385 printf("%02x", p1[i]);
1386 printf("\n");
1387 for (i = 0; i < (bitsleft ? bytelen + 1 : bytelen); i++)
1388 printf("%02x", p2[i]);
1389 printf("\n");
1390 }
1391
1392 for (i = 0; i < bytelen; i++) {
1393 if (*p1 != *p2)
1394 return 1;
1395 p1++;
1396 p2++;
1397 }
1398
1399 for (i = 0; i < bitsleft; i++) {
1400 bitmask = 1 << (7 - i);
1401 if ((*p1 & bitmask) != (*p2 & bitmask))
1402 return 1;
1403 }
1404
1405 return 0;
1406}
1407
1408/*
984263bc
MD
1409 * Scan for a host match in a directory tree.
1410 */
1411int
ce0e08e2
PA
1412chk_host(struct dirlist *dp, struct sockaddr *saddr, int *defsetp,
1413 int *hostsetp)
984263bc
MD
1414{
1415 struct hostlist *hp;
1416 struct grouplist *grp;
ce0e08e2 1417 struct addrinfo *ai;
984263bc
MD
1418
1419 if (dp) {
1420 if (dp->dp_flag & DP_DEFSET)
1421 *defsetp = dp->dp_flag;
1422 hp = dp->dp_hosts;
1423 while (hp) {
1424 grp = hp->ht_grp;
1425 switch (grp->gr_type) {
1426 case GT_HOST:
ce0e08e2
PA
1427 ai = grp->gr_ptr.gt_addrinfo;
1428 for (; ai; ai = ai->ai_next) {
1429 if (!sacmp(ai->ai_addr, saddr)) {
1430 *hostsetp =
1431 (hp->ht_flag | DP_HOSTSET);
1432 return (1);
1433 }
984263bc 1434 }
984263bc
MD
1435 break;
1436 case GT_NET:
ce0e08e2
PA
1437 if (!netpartcmp(saddr,
1438 (struct sockaddr *) &grp->gr_ptr.gt_net.nt_net,
1439 grp->gr_ptr.gt_net.nt_mask)) {
1440 *hostsetp = (hp->ht_flag | DP_HOSTSET);
1441 return (1);
1442 }
984263bc
MD
1443 break;
1444 };
1445 hp = hp->ht_next;
1446 }
1447 }
1448 return (0);
1449}
1450
1451/*
1452 * Scan tree for a host that matches the address.
1453 */
1454int
ce0e08e2 1455scan_tree(struct dirlist *dp, struct sockaddr *saddr)
984263bc
MD
1456{
1457 int defset, hostset;
1458
1459 if (dp) {
1460 if (scan_tree(dp->dp_left, saddr))
1461 return (1);
1462 if (chk_host(dp, saddr, &defset, &hostset))
1463 return (1);
1464 if (scan_tree(dp->dp_right, saddr))
1465 return (1);
1466 }
1467 return (0);
1468}
1469
1470/*
1471 * Traverse the dirlist tree and free it up.
1472 */
1473void
b5744197 1474free_dir(struct dirlist *dp)
984263bc
MD
1475{
1476
1477 if (dp) {
1478 free_dir(dp->dp_left);
1479 free_dir(dp->dp_right);
1480 free_host(dp->dp_hosts);
1481 free((caddr_t)dp);
1482 }
1483}
1484
1485/*
1486 * Parse the option string and update fields.
1487 * Option arguments may either be -<option>=<value> or
1488 * -<option> <value>
1489 */
1490int
b5744197
HP
1491do_opt(char **cpp, char **endcpp, struct exportlist *ep, struct grouplist *grp,
1492 int *has_hostp, int *exflagsp, struct ucred *cr)
984263bc
MD
1493{
1494 char *cpoptarg, *cpoptend;
1495 char *cp, *endcp, *cpopt, savedc, savedc2;
1496 int allflag, usedarg;
1497
1498 savedc2 = '\0';
1499 cpopt = *cpp;
1500 cpopt++;
1501 cp = *endcpp;
1502 savedc = *cp;
1503 *cp = '\0';
1504 while (cpopt && *cpopt) {
1505 allflag = 1;
1506 usedarg = -2;
1507 if ((cpoptend = strchr(cpopt, ','))) {
1508 *cpoptend++ = '\0';
1509 if ((cpoptarg = strchr(cpopt, '=')))
1510 *cpoptarg++ = '\0';
1511 } else {
1512 if ((cpoptarg = strchr(cpopt, '=')))
1513 *cpoptarg++ = '\0';
1514 else {
1515 *cp = savedc;
1516 nextfield(&cp, &endcp);
1517 **endcpp = '\0';
1518 if (endcp > cp && *cp != '-') {
1519 cpoptarg = cp;
1520 savedc2 = *endcp;
1521 *endcp = '\0';
1522 usedarg = 0;
1523 }
1524 }
1525 }
1526 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) {
1527 *exflagsp |= MNT_EXRDONLY;
1528 } else if (cpoptarg && (!strcmp(cpopt, "maproot") ||
1529 !(allflag = strcmp(cpopt, "mapall")) ||
1530 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) {
1531 usedarg++;
1532 parsecred(cpoptarg, cr);
1533 if (allflag == 0) {
1534 *exflagsp |= MNT_EXPORTANON;
1535 opt_flags |= OP_MAPALL;
1536 } else
1537 opt_flags |= OP_MAPROOT;
1538 } else if (!strcmp(cpopt, "kerb") || !strcmp(cpopt, "k")) {
1539 *exflagsp |= MNT_EXKERB;
1540 opt_flags |= OP_KERB;
1541 } else if (cpoptarg && (!strcmp(cpopt, "mask") ||
1542 !strcmp(cpopt, "m"))) {
1543 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) {
1544 syslog(LOG_ERR, "bad mask: %s", cpoptarg);
1545 return (1);
1546 }
1547 usedarg++;
1548 opt_flags |= OP_MASK;
1549 } else if (cpoptarg && (!strcmp(cpopt, "network") ||
1550 !strcmp(cpopt, "n"))) {
ce0e08e2
PA
1551 if (strchr(cpoptarg, '/') != NULL) {
1552 if (debug)
1553 fprintf(stderr, "setting OP_MASKLEN\n");
1554 opt_flags |= OP_MASKLEN;
1555 }
984263bc
MD
1556 if (grp->gr_type != GT_NULL) {
1557 syslog(LOG_ERR, "network/host conflict");
1558 return (1);
1559 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) {
1560 syslog(LOG_ERR, "bad net: %s", cpoptarg);
1561 return (1);
1562 }
1563 grp->gr_type = GT_NET;
1564 *has_hostp = 1;
1565 usedarg++;
1566 opt_flags |= OP_NET;
1567 } else if (!strcmp(cpopt, "alldirs")) {
1568 opt_flags |= OP_ALLDIRS;
1569 } else if (!strcmp(cpopt, "public")) {
1570 *exflagsp |= MNT_EXPUBLIC;
1571 } else if (!strcmp(cpopt, "webnfs")) {
1572 *exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON);
1573 opt_flags |= OP_MAPALL;
1574 } else if (cpoptarg && !strcmp(cpopt, "index")) {
1575 ep->ex_indexfile = strdup(cpoptarg);
1576 } else if (!strcmp(cpopt, "quiet")) {
1577 opt_flags |= OP_QUIET;
1578 } else {
1579 syslog(LOG_ERR, "bad opt %s", cpopt);
1580 return (1);
1581 }
1582 if (usedarg >= 0) {
1583 *endcp = savedc2;
1584 **endcpp = savedc;
1585 if (usedarg > 0) {
1586 *cpp = cp;
1587 *endcpp = endcp;
1588 }
1589 return (0);
1590 }
1591 cpopt = cpoptend;
1592 }
1593 **endcpp = savedc;
1594 return (0);
1595}
1596
1597/*
1598 * Translate a character string to the corresponding list of network
1599 * addresses for a hostname.
1600 */
1601int
b5744197 1602get_host(char *cp, struct grouplist *grp, struct grouplist *tgrp)
984263bc
MD
1603{
1604 struct grouplist *checkgrp;
ce0e08e2
PA
1605 struct addrinfo *ai, *tai, hints;
1606 int ecode;
1607 char host[NI_MAXHOST];
984263bc 1608
ce0e08e2
PA
1609 if (grp->gr_type != GT_NULL) {
1610 syslog(LOG_ERR, "Bad netgroup type for ip host %s", cp);
984263bc 1611 return (1);
ce0e08e2
PA
1612 }
1613 memset(&hints, 0, sizeof hints);
1614 hints.ai_flags = AI_CANONNAME;
1615 hints.ai_protocol = IPPROTO_UDP;
1616 ecode = getaddrinfo(cp, NULL, &hints, &ai);
1617 if (ecode != 0) {
1618 syslog(LOG_ERR,"can't get address info for host %s", cp);
1619 return 1;
1620 }
1621 grp->gr_ptr.gt_addrinfo = ai;
1622 while (ai != NULL) {
1623 if (ai->ai_canonname == NULL) {
1624 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, host,
1625 sizeof host, NULL, 0, ninumeric) != 0)
1626 strlcpy(host, "?", sizeof(host));
1627 ai->ai_canonname = strdup(host);
1628 ai->ai_flags |= AI_CANONNAME;
1629 }
1630 if (debug)
1631 fprintf(stderr, "got host %s\n", ai->ai_canonname);
1632 /*
1633 * Sanity check: make sure we don't already have an entry
1634 * for this host in the grouplist.
1635 */
1636 for (checkgrp = tgrp; checkgrp != NULL;
1637 checkgrp = checkgrp->gr_next) {
1638 if (checkgrp->gr_type != GT_HOST)
1639 continue;
1640 for (tai = checkgrp->gr_ptr.gt_addrinfo; tai != NULL;
1641 tai = tai->ai_next) {
1642 if (sacmp(tai->ai_addr, ai->ai_addr) != 0)
1643 continue;
1644 if (debug)
1645 fprintf(stderr,
1646 "ignoring duplicate host %s\n",
1647 ai->ai_canonname);
1648 grp->gr_type = GT_IGNORE;
1649 return (0);
984263bc 1650 }
984263bc 1651 }
ce0e08e2 1652 ai = ai->ai_next;
984263bc 1653 }
984263bc 1654 grp->gr_type = GT_HOST;
984263bc
MD
1655 return (0);
1656}
1657
1658/*
1659 * Free up an exports list component
1660 */
1661void
b5744197 1662free_exp(struct exportlist *ep)
984263bc
MD
1663{
1664
1665 if (ep->ex_defdir) {
1666 free_host(ep->ex_defdir->dp_hosts);
1667 free((caddr_t)ep->ex_defdir);
1668 }
1669 if (ep->ex_fsdir)
1670 free(ep->ex_fsdir);
1671 if (ep->ex_indexfile)
1672 free(ep->ex_indexfile);
1673 free_dir(ep->ex_dirl);
1674 free((caddr_t)ep);
1675}
1676
1677/*
1678 * Free hosts.
1679 */
1680void
b5744197 1681free_host(struct hostlist *hp)
984263bc
MD
1682{
1683 struct hostlist *hp2;
1684
1685 while (hp) {
1686 hp2 = hp;
1687 hp = hp->ht_next;
1688 free((caddr_t)hp2);
1689 }
1690}
1691
1692struct hostlist *
b5744197 1693get_ht(void)
984263bc
MD
1694{
1695 struct hostlist *hp;
1696
1697 hp = (struct hostlist *)malloc(sizeof (struct hostlist));
1698 if (hp == (struct hostlist *)NULL)
1699 out_of_mem();
1700 hp->ht_next = (struct hostlist *)NULL;
1701 hp->ht_flag = 0;
1702 return (hp);
1703}
1704
1705/*
1706 * Out of memory, fatal
1707 */
1708void
b5744197 1709out_of_mem(void)
984263bc
MD
1710{
1711
1712 syslog(LOG_ERR, "out of memory");
1713 exit(2);
1714}
1715
1716/*
1717 * Do the mount syscall with the update flag to push the export info into
1718 * the kernel.
1719 */
1720int
b5744197
HP
1721do_mount(struct exportlist *ep, struct grouplist *grp, int exflags,
1722 struct ucred *anoncrp, char *dirp, int dirplen, struct statfs *fsb)
984263bc
MD
1723{
1724 struct statfs fsb1;
ce0e08e2
PA
1725 struct sockaddr_storage ss;
1726 struct addrinfo *ai;
984263bc 1727 char *cp = NULL;
984263bc
MD
1728 int done;
1729 char savedc = '\0';
984263bc
MD
1730 union {
1731 struct ufs_args ua;
1732 struct iso_args ia;
1733 struct mfs_args ma;
1734#ifdef __NetBSD__
1735 struct msdosfs_args da;
ce0e08e2 1736 struct adosfs_args aa;
984263bc
MD
1737#endif
1738 struct ntfs_args na;
1739 } args;
984263bc
MD
1740
1741 args.ua.fspec = 0;
1742 args.ua.export.ex_flags = exflags;
1743 args.ua.export.ex_anon = *anoncrp;
1744 args.ua.export.ex_indexfile = ep->ex_indexfile;
984263bc 1745 if (grp->gr_type == GT_HOST)
ce0e08e2 1746 ai = grp->gr_ptr.gt_addrinfo;
984263bc 1747 else
ce0e08e2 1748 ai = NULL;
984263bc
MD
1749 done = FALSE;
1750 while (!done) {
1751 switch (grp->gr_type) {
1752 case GT_HOST:
ce0e08e2
PA
1753 if (ai->ai_addr->sa_family == AF_INET6 && have_v6 == 0)
1754 goto skip;
1755 args.ua.export.ex_addr = ai->ai_addr;
1756 args.ua.export.ex_addrlen = ai->ai_addrlen;
984263bc
MD
1757 args.ua.export.ex_masklen = 0;
1758 break;
1759 case GT_NET:
ce0e08e2
PA
1760 args.ua.export.ex_addr = (struct sockaddr *)
1761 &grp->gr_ptr.gt_net.nt_net;
1762 if (args.ua.export.ex_addr->sa_family == AF_INET6 &&
1763 have_v6 == 0)
1764 goto skip;
1765 args.ua.export.ex_addrlen =
1766 args.ua.export.ex_addr->sa_len;
1767 memset(&ss, 0, sizeof ss);
1768 ss.ss_family = args.ua.export.ex_addr->sa_family;
1769 ss.ss_len = args.ua.export.ex_addr->sa_len;
1770 if (allones(&ss, grp->gr_ptr.gt_net.nt_mask) != 0) {
1771 syslog(LOG_ERR, "Bad network flag");
1772 if (cp)
1773 *cp = savedc;
1774 return (1);
984263bc 1775 }
ce0e08e2
PA
1776 args.ua.export.ex_mask = (struct sockaddr *)&ss;
1777 args.ua.export.ex_masklen = ss.ss_len;
1778 break;
1779 case GT_DEFAULT:
1780 args.ua.export.ex_addr = NULL;
1781 args.ua.export.ex_addrlen = 0;
1782 args.ua.export.ex_mask = NULL;
1783 args.ua.export.ex_masklen = 0;
984263bc
MD
1784 break;
1785 case GT_IGNORE:
1786 return(0);
1787 break;
1788 default:
1789 syslog(LOG_ERR, "bad grouptype");
1790 if (cp)
1791 *cp = savedc;
1792 return (1);
1793 };
1794
1795 /*
1796 * XXX:
1797 * Maybe I should just use the fsb->f_mntonname path instead
1798 * of looping back up the dirp to the mount point??
1799 * Also, needs to know how to export all types of local
1800 * exportable file systems and not just "ufs".
1801 */
1aa89f17
MD
1802 for (;;) {
1803 int r;
1804
1805 r = mountctl(fsb->f_mntonname, MOUNTCTL_SET_EXPORT,
1806 -1,
1807 &args.ua.export, sizeof(args.ua.export),
1808 NULL, 0);
1809 if (r < 0 && errno == EOPNOTSUPP) {
1810 r = mount(fsb->f_fstypename, dirp,
1811 fsb->f_flags | MNT_UPDATE,
1812 (caddr_t)&args);
1813 }
1814 if (r >= 0)
1815 break;
984263bc
MD
1816 if (cp)
1817 *cp-- = savedc;
1818 else
1819 cp = dirp + dirplen - 1;
1820 if (opt_flags & OP_QUIET)
1821 return (1);
1822 if (errno == EPERM) {
ce0e08e2
PA
1823 if (debug)
1824 warnx("can't change attributes for %s",
1825 dirp);
984263bc
MD
1826 syslog(LOG_ERR,
1827 "can't change attributes for %s", dirp);
1828 return (1);
1829 }
1830 if (opt_flags & OP_ALLDIRS) {
1831 if (errno == EINVAL)
1832 syslog(LOG_ERR,
1833 "-alldirs requested but %s is not a filesystem mountpoint",
1834 dirp);
1835 else
1836 syslog(LOG_ERR,
1837 "could not remount %s: %m",
1838 dirp);
1839 return (1);
1840 }
1841 /* back up over the last component */
1842 while (*cp == '/' && cp > dirp)
1843 cp--;
1844 while (*(cp - 1) != '/' && cp > dirp)
1845 cp--;
1846 if (cp == dirp) {
1847 if (debug)
1848 warnx("mnt unsucc");
1849 syslog(LOG_ERR, "can't export %s", dirp);
1850 return (1);
1851 }
1852 savedc = *cp;
1853 *cp = '\0';
1854 /* Check that we're still on the same filesystem. */
1855 if (statfs(dirp, &fsb1) != 0 || bcmp(&fsb1.f_fsid,
1856 &fsb->f_fsid, sizeof(fsb1.f_fsid)) != 0) {
1857 *cp = savedc;
1858 syslog(LOG_ERR, "can't export %s", dirp);
1859 return (1);
1860 }
1861 }
ce0e08e2
PA
1862skip:
1863 if (ai != NULL)
1864 ai = ai->ai_next;
1865 if (ai == NULL)
984263bc
MD
1866 done = TRUE;
1867 }
1868 if (cp)
1869 *cp = savedc;
1870 return (0);
1871}
1872
1873/*
1874 * Translate a net address.
1875 */
1876int
b5744197 1877get_net(char *cp, struct netmsk *net, int maskflg)
984263bc
MD
1878{
1879 struct netent *np;
ce0e08e2
PA
1880 char *name, *p, *prefp;
1881 struct sockaddr_in sin, *sinp;
1882 struct sockaddr *sa;
1883 struct addrinfo hints, *ai = NULL;
1884 char netname[NI_MAXHOST];
1885 long preflen;
1886 int ecode;
1887
1888 p = prefp = NULL;
1889 if ((opt_flags & OP_MASKLEN) && !maskflg) {
1890 p = strchr(cp, '/');
1891 *p = '\0';
1892 prefp = p + 1;
1893 }
984263bc 1894
ce0e08e2
PA
1895 if ((np = getnetbyname(cp)) != NULL) {
1896 sin.sin_family = AF_INET;
1897 sin.sin_len = sizeof sin;
1898 sin.sin_addr = inet_makeaddr(np->n_net, 0);
1899 sa = (struct sockaddr *)&sin;
1900 } else if (isdigit(*cp)) {
1901 memset(&hints, 0, sizeof hints);
1902 hints.ai_family = AF_UNSPEC;
1903 hints.ai_flags = AI_NUMERICHOST;
1904 if (getaddrinfo(cp, NULL, &hints, &ai) != 0) {
1905 /*
1906 * If getaddrinfo() failed, try the inet4 network
1907 * notation with less than 3 dots.
1908 */
1909 sin.sin_family = AF_INET;
1910 sin.sin_len = sizeof sin;
1911 sin.sin_addr = inet_makeaddr(inet_network(cp),0);
1912 if (debug)
1913 fprintf(stderr, "get_net: v4 addr %x\n",
1914 sin.sin_addr.s_addr);
1915 sa = (struct sockaddr *)&sin;
1916 } else
1917 sa = ai->ai_addr;
1918 } else if (isxdigit(*cp) || *cp == ':') {
1919 memset(&hints, 0, sizeof hints);
1920 hints.ai_family = AF_UNSPEC;
1921 hints.ai_flags = AI_NUMERICHOST;
1922 if (getaddrinfo(cp, NULL, &hints, &ai) == 0)
1923 sa = ai->ai_addr;
1924 else
1925 goto fail;
984263bc 1926 } else
ce0e08e2
PA
1927 goto fail;
1928
1929 ecode = getnameinfo(sa, sa->sa_len, netname, sizeof netname,
1930 NULL, 0, ninumeric);
1931 if (ecode != 0)
1932 goto fail;
984263bc
MD
1933
1934 if (maskflg)
ce0e08e2 1935 net->nt_mask = countones(sa);
984263bc 1936 else {
ce0e08e2
PA
1937 if (opt_flags & OP_MASKLEN) {
1938 preflen = strtol(prefp, NULL, 10);
1939 if (preflen == LONG_MIN && errno == ERANGE)
1940 goto fail;
1941 net->nt_mask = (int)preflen;
1942 *p = '/';
1943 }
1944
984263bc
MD
1945 if (np)
1946 name = np->n_name;
ce0e08e2
PA
1947 else {
1948 if (getnameinfo(sa, sa->sa_len, netname, sizeof netname,
1949 NULL, 0, ninumeric) != 0)
1950 strlcpy(netname, "?", sizeof(netname));
1951 name = netname;
1952 }
1953 net->nt_name = strdup(name);
1954 memcpy(&net->nt_net, sa, sa->sa_len);
1955 }
1956
1957 if (!maskflg && sa->sa_family == AF_INET &&
1958 !(opt_flags & (OP_MASK|OP_MASKLEN))) {
1959 sinp = (struct sockaddr_in *)sa;
1960 if (IN_CLASSA(sinp->sin_addr.s_addr))
1961 net->nt_mask = 8;
1962 else if (IN_CLASSB(sinp->sin_addr.s_addr))
1963 net->nt_mask = 16;
1964 else if (IN_CLASSC(sinp->sin_addr.s_addr))
1965 net->nt_mask = 24;
1966 else if (IN_CLASSD(sinp->sin_addr.s_addr))
1967 net->nt_mask = 28;
984263bc 1968 else
ce0e08e2 1969 net->nt_mask = 32; /* XXX */
984263bc 1970 }
ce0e08e2
PA
1971
1972 if (ai)
1973 freeaddrinfo(ai);
1974 return 0;
1975
1976fail:
1977 if (ai)
1978 freeaddrinfo(ai);
1979 return 1;
984263bc
MD
1980}
1981
1982/*
1983 * Parse out the next white space separated field
1984 */
1985void
b5744197 1986nextfield(char **cp, char **endcp)
984263bc
MD
1987{
1988 char *p;
1989
1990 p = *cp;
1991 while (*p == ' ' || *p == '\t')
1992 p++;
1993 if (*p == '\n' || *p == '\0')
1994 *cp = *endcp = p;
1995 else {
1996 *cp = p++;
1997 while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0')
1998 p++;
1999 *endcp = p;
2000 }
2001}
2002
2003/*
2004 * Get an exports file line. Skip over blank lines and handle line
2005 * continuations.
2006 */
2007int
b5744197 2008get_line(void)
984263bc
MD
2009{
2010 char *p, *cp;
2011 int len;
2012 int totlen, cont_line;
2013
2014 /*
2015 * Loop around ignoring blank lines and getting all continuation lines.
2016 */
2017 p = line;
2018 totlen = 0;
2019 do {
2020 if (fgets(p, LINESIZ - totlen, exp_file) == NULL)
2021 return (0);
2022 len = strlen(p);
2023 cp = p + len - 1;
2024 cont_line = 0;
2025 while (cp >= p &&
2026 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) {
2027 if (*cp == '\\')
2028 cont_line = 1;
2029 cp--;
2030 len--;
2031 }
2032 if (cont_line) {
2033 *++cp = ' ';
2034 len++;
2035 }
2036 *++cp = '\0';
2037 if (len > 0) {
2038 totlen += len;
2039 if (totlen >= LINESIZ) {
2040 syslog(LOG_ERR, "exports line too long");
2041 exit(2);
2042 }
2043 p = cp;
2044 }
2045 } while (totlen == 0 || cont_line);
2046 return (1);
2047}
2048
2049/*
2050 * Parse a description of a credential.
2051 */
2052void
b5744197 2053parsecred(char *namelist, struct ucred *cr)
984263bc
MD
2054{
2055 char *name;
2056 int cnt;
2057 char *names;
2058 struct passwd *pw;
2059 struct group *gr;
2060 int ngroups, groups[NGROUPS + 1];
2061
2062 /*
2063 * Set up the unprivileged user.
2064 */
2065 cr->cr_ref = 1;
2066 cr->cr_uid = -2;
2067 cr->cr_groups[0] = -2;
2068 cr->cr_ngroups = 1;
2069 /*
2070 * Get the user's password table entry.
2071 */
2072 names = strsep(&namelist, " \t\n");
2073 name = strsep(&names, ":");
2074 if (isdigit(*name) || *name == '-')
2075 pw = getpwuid(atoi(name));
2076 else
2077 pw = getpwnam(name);
2078 /*
2079 * Credentials specified as those of a user.
2080 */
2081 if (names == NULL) {
2082 if (pw == NULL) {
2083 syslog(LOG_ERR, "unknown user: %s", name);
2084 return;
2085 }
2086 cr->cr_uid = pw->pw_uid;
2087 ngroups = NGROUPS + 1;
2088 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups))
2089 syslog(LOG_ERR, "too many groups");
2090 /*
2091 * Convert from int's to gid_t's and compress out duplicate
2092 */
2093 cr->cr_ngroups = ngroups - 1;
2094 cr->cr_groups[0] = groups[0];
2095 for (cnt = 2; cnt < ngroups; cnt++)
2096 cr->cr_groups[cnt - 1] = groups[cnt];
2097 return;
2098 }
2099 /*
2100 * Explicit credential specified as a colon separated list:
2101 * uid:gid:gid:...
2102 */
2103 if (pw != NULL)
2104 cr->cr_uid = pw->pw_uid;
2105 else if (isdigit(*name) || *name == '-')
2106 cr->cr_uid = atoi(name);
2107 else {
2108 syslog(LOG_ERR, "unknown user: %s", name);
2109 return;
2110 }
2111 cr->cr_ngroups = 0;
2112 while (names != NULL && *names != '\0' && cr->cr_ngroups < NGROUPS) {
2113 name = strsep(&names, ":");
2114 if (isdigit(*name) || *name == '-') {
2115 cr->cr_groups[cr->cr_ngroups++] = atoi(name);
2116 } else {
2117 if ((gr = getgrnam(name)) == NULL) {
2118 syslog(LOG_ERR, "unknown group: %s", name);
2119 continue;
2120 }
2121 cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid;
2122 }
2123 }
2124 if (names != NULL && *names != '\0' && cr->cr_ngroups == NGROUPS)
2125 syslog(LOG_ERR, "too many groups");
2126}
2127
2128#define STRSIZ (RPCMNT_NAMELEN+RPCMNT_PATHLEN+50)
2129/*
2130 * Routines that maintain the remote mounttab
2131 */
2132void
b5744197 2133get_mountlist(void)
984263bc
MD
2134{
2135 struct mountlist *mlp, **mlpp;
2136 char *host, *dirp, *cp;
2137 char str[STRSIZ];
2138 FILE *mlfile;
2139
2140 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) {
2141 if (errno == ENOENT)
2142 return;
2143 else {
2144 syslog(LOG_ERR, "can't open %s", _PATH_RMOUNTLIST);
2145 return;
2146 }
2147 }
2148 mlpp = &mlhead;
2149 while (fgets(str, STRSIZ, mlfile) != NULL) {
2150 cp = str;
2151 host = strsep(&cp, " \t\n");
2152 dirp = strsep(&cp, " \t\n");
2153 if (host == NULL || dirp == NULL)
2154 continue;
2155 mlp = (struct mountlist *)malloc(sizeof (*mlp));
2156 if (mlp == (struct mountlist *)NULL)
2157 out_of_mem();
2158 strncpy(mlp->ml_host, host, RPCMNT_NAMELEN);
2159 mlp->ml_host[RPCMNT_NAMELEN] = '\0';
2160 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN);
2161 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0';
2162 mlp->ml_next = (struct mountlist *)NULL;
2163 *mlpp = mlp;
2164 mlpp = &mlp->ml_next;
2165 }
2166 fclose(mlfile);
2167}
2168
2169void
b5744197 2170del_mlist(char *hostp, char *dirp)
984263bc
MD
2171{
2172 struct mountlist *mlp, **mlpp;
2173 struct mountlist *mlp2;
2174 FILE *mlfile;
2175 int fnd = 0;
2176
2177 mlpp = &mlhead;
2178 mlp = mlhead;
2179 while (mlp) {
2180 if (!strcmp(mlp->ml_host, hostp) &&
2181 (!dirp || !strcmp(mlp->ml_dirp, dirp))) {
2182 fnd = 1;
2183 mlp2 = mlp;
2184 *mlpp = mlp = mlp->ml_next;
2185 free((caddr_t)mlp2);
2186 } else {
2187 mlpp = &mlp->ml_next;
2188 mlp = mlp->ml_next;
2189 }
2190 }
2191 if (fnd) {
2192 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) {
2193 syslog(LOG_ERR,"can't update %s", _PATH_RMOUNTLIST);
2194 return;
2195 }
2196 mlp = mlhead;
2197 while (mlp) {
2198 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
2199 mlp = mlp->ml_next;
2200 }
2201 fclose(mlfile);
2202 }
2203}
2204
2205void
b5744197 2206add_mlist(char *hostp, char *dirp)
984263bc
MD
2207{
2208 struct mountlist *mlp, **mlpp;
2209 FILE *mlfile;
2210
2211 mlpp = &mlhead;
2212 mlp = mlhead;
2213 while (mlp) {
2214 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp))
2215 return;
2216 mlpp = &mlp->ml_next;
2217 mlp = mlp->ml_next;
2218 }
2219 mlp = (struct mountlist *)malloc(sizeof (*mlp));
2220 if (mlp == (struct mountlist *)NULL)
2221 out_of_mem();
2222 strncpy(mlp->ml_host, hostp, RPCMNT_NAMELEN);
2223 mlp->ml_host[RPCMNT_NAMELEN] = '\0';
2224 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN);
2225 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0';
2226 mlp->ml_next = (struct mountlist *)NULL;
2227 *mlpp = mlp;
2228 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) {
2229 syslog(LOG_ERR, "can't update %s", _PATH_RMOUNTLIST);
2230 return;
2231 }
2232 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
2233 fclose(mlfile);
2234}
2235
2236/*
2237 * Free up a group list.
2238 */
2239void
b5744197 2240free_grp(struct grouplist *grp)
984263bc 2241{
984263bc 2242 if (grp->gr_type == GT_HOST) {
ce0e08e2
PA
2243 if (grp->gr_ptr.gt_addrinfo != NULL)
2244 freeaddrinfo(grp->gr_ptr.gt_addrinfo);
984263bc
MD
2245 } else if (grp->gr_type == GT_NET) {
2246 if (grp->gr_ptr.gt_net.nt_name)
2247 free(grp->gr_ptr.gt_net.nt_name);
2248 }
2249 free((caddr_t)grp);
2250}
2251
2252#ifdef DEBUG
2253void
2254SYSLOG(int pri, const char *fmt, ...)
2255{
2256 va_list ap;
2257
2258 va_start(ap, fmt);
2259 vfprintf(stderr, fmt, ap);
2260 va_end(ap);
2261}
2262#endif /* DEBUG */
2263
2264/*
2265 * Check options for consistency.
2266 */
2267int
b5744197 2268check_options(struct dirlist *dp)
984263bc
MD
2269{
2270
2271 if (dp == (struct dirlist *)NULL)
2272 return (1);
2273 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL) ||
2274 (opt_flags & (OP_MAPROOT | OP_KERB)) == (OP_MAPROOT | OP_KERB) ||
2275 (opt_flags & (OP_MAPALL | OP_KERB)) == (OP_MAPALL | OP_KERB)) {
2276 syslog(LOG_ERR, "-mapall, -maproot and -kerb mutually exclusive");
2277 return (1);
2278 }
2279 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) {
2280 syslog(LOG_ERR, "-mask requires -network");
2281 return (1);
2282 }
2283 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) {
2284 syslog(LOG_ERR, "-alldirs has multiple directories");
2285 return (1);
2286 }
2287 return (0);
2288}
2289
2290/*
2291 * Check an absolute directory path for any symbolic links. Return true
984263bc
MD
2292 */
2293int
b5744197 2294check_dirpath(char *dirp)
984263bc
MD
2295{
2296 char *cp;
2297 int ret = 1;
2298 struct stat sb;
2299
2300 cp = dirp + 1;
2301 while (*cp && ret) {
2302 if (*cp == '/') {
2303 *cp = '\0';
2304 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode))
2305 ret = 0;
2306 *cp = '/';
2307 }
2308 cp++;
2309 }
2310 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode))
2311 ret = 0;
2312 return (ret);
2313}
2314
ce0e08e2
PA
2315static int
2316netpartcmp(struct sockaddr *s1, struct sockaddr *s2, int bitlen)
984263bc 2317{
ce0e08e2
PA
2318 void *src, *dst;
2319
2320 if (s1->sa_family != s2->sa_family)
2321 return 1;
2322
2323 switch (s1->sa_family) {
2324 case AF_INET:
2325 src = &((struct sockaddr_in *)s1)->sin_addr;
2326 dst = &((struct sockaddr_in *)s2)->sin_addr;
2327 if (bitlen > sizeof(((struct sockaddr_in *)s1)->sin_addr) * 8)
2328 return 1;
2329 break;
2330 case AF_INET6:
2331 src = &((struct sockaddr_in6 *)s1)->sin6_addr;
2332 dst = &((struct sockaddr_in6 *)s2)->sin6_addr;
2333 if (((struct sockaddr_in6 *)s1)->sin6_scope_id !=
2334 ((struct sockaddr_in6 *)s2)->sin6_scope_id)
2335 return 1;
2336 if (bitlen > sizeof(((struct sockaddr_in6 *)s1)->sin6_addr) * 8)
2337 return 1;
2338 break;
2339 default:
2340 return 1;
2341 }
2342
2343 return bitcmp(src, dst, bitlen);
2344}
2345
2346static int
2347allones(struct sockaddr_storage *ssp, int bitlen)
2348{
2349 u_int8_t *p;
2350 int bytelen, bitsleft, i;
2351 int zerolen;
2352
2353 switch (ssp->ss_family) {
2354 case AF_INET:
2355 p = (u_int8_t *)&((struct sockaddr_in *)ssp)->sin_addr;
2356 zerolen = sizeof (((struct sockaddr_in *)ssp)->sin_addr);
2357 break;
2358 case AF_INET6:
2359 p = (u_int8_t *)&((struct sockaddr_in6 *)ssp)->sin6_addr;
2360 zerolen = sizeof (((struct sockaddr_in6 *)ssp)->sin6_addr);
2361 break;
2362 default:
2363 return -1;
2364 }
984263bc 2365
ce0e08e2
PA
2366 memset(p, 0, zerolen);
2367
2368 bytelen = bitlen / 8;
2369 bitsleft = bitlen % 8;
2370
2371 if (bytelen > zerolen)
2372 return -1;
2373
2374 for (i = 0; i < bytelen; i++)
2375 *p++ = 0xff;
2376
2377 for (i = 0; i < bitsleft; i++)
2378 *p |= 1 << (7 - i);
2379
2380 return 0;
2381}
2382
2383static int
2384countones(struct sockaddr *sa)
2385{
2386 void *mask;
2387 int i, bits = 0, bytelen;
2388 u_int8_t *p;
2389
2390 switch (sa->sa_family) {
2391 case AF_INET:
2392 mask = (u_int8_t *)&((struct sockaddr_in *)sa)->sin_addr;
2393 bytelen = 4;
2394 break;
2395 case AF_INET6:
2396 mask = (u_int8_t *)&((struct sockaddr_in6 *)sa)->sin6_addr;
2397 bytelen = 16;
2398 break;
2399 default:
2400 return 0;
984263bc 2401 }
ce0e08e2
PA
2402
2403 p = mask;
2404
2405 for (i = 0; i < bytelen; i++, p++) {
2406 if (*p != 0xff) {
2407 for (bits = 0; bits < 8; bits++) {
2408 if (!(*p & (1 << (7 - bits))))
2409 break;
2410 }
2411 break;
2412 }
2413 }
2414
2415 return (i * 8 + bits);
2416}
2417
2418static int
2419sacmp(struct sockaddr *sa1, struct sockaddr *sa2)
2420{
2421 void *p1, *p2;
2422 int len;
2423
2424 if (sa1->sa_family != sa2->sa_family)
2425 return 1;
2426
2427 switch (sa1->sa_family) {
2428 case AF_INET:
2429 p1 = &((struct sockaddr_in *)sa1)->sin_addr;
2430 p2 = &((struct sockaddr_in *)sa2)->sin_addr;
2431 len = 4;
2432 break;
2433 case AF_INET6:
2434 p1 = &((struct sockaddr_in6 *)sa1)->sin6_addr;
2435 p2 = &((struct sockaddr_in6 *)sa2)->sin6_addr;
2436 len = 16;
2437 if (((struct sockaddr_in6 *)sa1)->sin6_scope_id !=
2438 ((struct sockaddr_in6 *)sa2)->sin6_scope_id)
2439 return 1;
2440 break;
2441 default:
2442 return 1;
2443 }
2444
2445 return memcmp(p1, p2, len);
2446}
2447
2448void
2449huphandler(int sig)
2450{
2451 got_sighup = 1;
2452}
2453
2454void terminate(sig)
2455int sig;
2456{
2457 close(mountdlockfd);
2458 unlink(MOUNTDLOCK);
2459 rpcb_unset(RPCPROG_MNT, RPCMNT_VER1, NULL);
2460 rpcb_unset(RPCPROG_MNT, RPCMNT_VER3, NULL);
2461 exit (0);
984263bc 2462}