summaryrefslogtreecommitdiffstats
path: root/sbin/mount_nfs/mount_nfs.c
blob: 41873cace7a73d718c072eeb6ae627c299306651 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
/*
 * Copyright (c) 1992, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Rick Macklem at The University of Guelph.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1992, 1993, 1994\n\
	The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)mount_nfs.c	8.11 (Berkeley) 5/4/95";
#endif
static const char rcsid[] =
  "$FreeBSD$";
#endif /* not lint */

#include <sys/param.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/syslog.h>

#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <rpc/pmap_prot.h>

#ifdef NFSKERB
#include <kerberosIV/des.h>
#include <kerberosIV/krb.h>
#endif

#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfs/nfs.h>
#include <nfs/nqnfs.h>

#include <arpa/inet.h>

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <sysexits.h>
#include <unistd.h>

#include "mntopts.h"
#include "mounttab.h"

#define	ALTF_BG		0x1
#define ALTF_NOCONN	0x2
#define ALTF_DUMBTIMR	0x4
#define ALTF_INTR	0x8
#define ALTF_KERB	0x10
#define ALTF_NFSV3	0x20
#define ALTF_RDIRPLUS	0x40
#define	ALTF_MNTUDP	0x80
#define ALTF_RESVPORT	0x100
#define ALTF_SEQPACKET	0x200
#define ALTF_NQNFS	0x400
#define ALTF_SOFT	0x800
#define ALTF_TCP	0x1000
#define ALTF_PORT	0x2000
#define ALTF_NFSV2	0x4000
#define ALTF_ACREGMIN	0x8000
#define ALTF_ACREGMAX	0x10000
#define ALTF_ACDIRMIN	0x20000
#define ALTF_ACDIRMAX	0x40000

struct mntopt mopts[] = {
	MOPT_STDOPTS,
	MOPT_FORCE,
	MOPT_UPDATE,
	MOPT_ASYNC,
	{ "bg", 0, ALTF_BG, 1 },
	{ "conn", 1, ALTF_NOCONN, 1 },
	{ "dumbtimer", 0, ALTF_DUMBTIMR, 1 },
	{ "intr", 0, ALTF_INTR, 1 },
#ifdef NFSKERB
	{ "kerb", 0, ALTF_KERB, 1 },
#endif
	{ "nfsv3", 0, ALTF_NFSV3, 1 },
	{ "rdirplus", 0, ALTF_RDIRPLUS, 1 },
	{ "mntudp", 0, ALTF_MNTUDP, 1 },
	{ "resvport", 0, ALTF_RESVPORT, 1 },
	{ "nqnfs", 0, ALTF_NQNFS, 1 },
	{ "soft", 0, ALTF_SOFT, 1 },
	{ "tcp", 0, ALTF_TCP, 1 },
	{ "port=", 0, ALTF_PORT, 1 },
	{ "nfsv2", 0, ALTF_NFSV2, 1 },
	{ "acregmin=", 0, ALTF_ACREGMIN, 1 },
	{ "acregmax=", 0, ALTF_ACREGMAX, 1 },
	{ "acdirmin=", 0, ALTF_ACDIRMIN, 1 },
	{ "acdirmax=", 0, ALTF_ACDIRMAX, 1 },
	{ NULL }
};

struct nfs_args nfsdefargs = {
	NFS_ARGSVERSION,
	(struct sockaddr *)0,
	sizeof (struct sockaddr_in),
	SOCK_DGRAM,
	0,
	(u_char *)0,
	0,
	NFSMNT_RESVPORT,
	NFS_WSIZE,
	NFS_RSIZE,
	NFS_READDIRSIZE,
	10,
	NFS_RETRANS,
	NFS_MAXGRPS,
	NFS_DEFRAHEAD,
	NQ_DEFLEASE,
	NQ_DEADTHRESH,
	(char *)0,
	/* args version 4 */
	NFS_MINATTRTIMO,
	NFS_MAXATTRTIMO,
	NFS_MINDIRATTRTIMO,
	NFS_MAXDIRATTRTIMO,
};

struct nfhret {
	u_long		stat;
	long		vers;
	long		auth;
	long		fhsize;
	u_char		nfh[NFSX_V3FHMAX];
};
#define	DEF_RETRY	10000
#define	BGRND	1
#define	ISBGRND	2
int retrycnt = DEF_RETRY;
int opflags = 0;
int nfsproto = IPPROTO_UDP;
int mnttcp_ok = 1;
u_short port_no = 0;
enum {
	ANY,
	V2,
	V3
} mountmode = ANY;

#ifdef NFSKERB
char inst[INST_SZ];
char realm[REALM_SZ];
struct {
	u_long		kind;
	KTEXT_ST	kt;
} ktick;
struct nfsrpc_nickverf kverf;
struct nfsrpc_fullblock kin, kout;
NFSKERBKEY_T kivec;
CREDENTIALS kcr;
struct timeval ktv;
NFSKERBKEYSCHED_T kerb_keysched;
#endif

int	getnfsargs __P((char *, struct nfs_args *));
void	set_rpc_maxgrouplist __P((int));
void	usage __P((void)) __dead2;
int	xdr_dir __P((XDR *, char *));
int	xdr_fh __P((XDR *, struct nfhret *));

/*
 * Used to set mount flags with getmntopts.  Call with dir=TRUE to
 * initialize altflags from the current mount flags.  Call with
 * dir=FALSE to update mount flags with the new value of altflags after
 * the call to getmntopts.
 */
static void
set_flags(int* altflags, int* nfsflags, int dir)
{
#define F2(af, nf)					\
	if (dir) {					\
		if (*nfsflags & NFSMNT_##nf)		\
			*altflags |= ALTF_##af;		\
		else					\
			*altflags &= ~ALTF_##af;	\
	} else {					\
		if (*altflags & ALTF_##af)		\
			*nfsflags |= NFSMNT_##nf;	\
		else					\
			*nfsflags &= ~NFSMNT_##nf;	\
	}
#define F(f)	F2(f,f)

	F(NOCONN);
	F(DUMBTIMR);
	F2(INTR, INT);
#ifdef NFSKERB
	F(KERB);
#endif
	F(RDIRPLUS);
	F(RESVPORT);
	F(NQNFS);
	F(SOFT);

#undef F
#undef F2
}

int
main(argc, argv)
	int argc;
	char *argv[];
{
	register int c;
	register struct nfs_args *nfsargsp;
	struct nfs_args nfsargs;
	struct nfsd_cargs ncd;
	int mntflags, altflags, i, nfssvc_flag, num;
	char *name, *p, *spec;
	char mntpath[MAXPATHLEN];
	struct vfsconf vfc;
	int error = 0;
#ifdef NFSKERB
	uid_t last_ruid;

	last_ruid = -1;
	(void)strcpy(realm, KRB_REALM);
	if (sizeof (struct nfsrpc_nickverf) != RPCX_NICKVERF ||
	    sizeof (struct nfsrpc_fullblock) != RPCX_FULLBLOCK ||
	    ((char *)&ktick.kt) - ((char *)&ktick) != NFSX_UNSIGNED ||
	    ((char *)ktick.kt.dat) - ((char *)&ktick) != 2 * NFSX_UNSIGNED)
		fprintf(stderr, "Yikes! NFSKERB structs not packed!!\n");
#endif /* NFSKERB */
	retrycnt = DEF_RETRY;

	mntflags = 0;
	altflags = 0;
	nfsargs = nfsdefargs;
	nfsargsp = &nfsargs;
	while ((c = getopt(argc, argv,
	    "23a:bcdD:g:I:iKL:lm:No:PpqR:r:sTt:w:x:U")) != -1)
		switch (c) {
		case '2':
			mountmode = V2;
			break;
		case '3':
			mountmode = V3;
			break;
		case 'a':
			num = strtol(optarg, &p, 10);
			if (*p || num < 0)
				errx(1, "illegal -a value -- %s", optarg);
			nfsargsp->readahead = num;
			nfsargsp->flags |= NFSMNT_READAHEAD;
			break;
		case 'b':
			opflags |= BGRND;
			break;
		case 'c':
			nfsargsp->flags |= NFSMNT_NOCONN;
			break;
		case 'D':
			num = strtol(optarg, &p, 10);
			if (*p || num <= 0)
				errx(1, "illegal -D value -- %s", optarg);
			nfsargsp->deadthresh = num;
			nfsargsp->flags |= NFSMNT_DEADTHRESH;
			break;
		case 'd':
			nfsargsp->flags |= NFSMNT_DUMBTIMR;
			break;
		case 'g':
			num = strtol(optarg, &p, 10);
			if (*p || num <= 0)
				errx(1, "illegal -g value -- %s", optarg);
#ifdef __FreeBSD__
			set_rpc_maxgrouplist(num);
#endif
			nfsargsp->maxgrouplist = num;
			nfsargsp->flags |= NFSMNT_MAXGRPS;
			break;
		case 'I':
			num = strtol(optarg, &p, 10);
			if (*p || num <= 0)
				errx(1, "illegal -I value -- %s", optarg);
			nfsargsp->readdirsize = num;
			nfsargsp->flags |= NFSMNT_READDIRSIZE;
			break;
		case 'i':
			nfsargsp->flags |= NFSMNT_INT;
			break;
#ifdef NFSKERB
		case 'K':
			nfsargsp->flags |= NFSMNT_KERB;
			break;
#endif
		case 'L':
			num = strtol(optarg, &p, 10);
			if (*p || num < 2)
				errx(1, "illegal -L value -- %s", optarg);
			nfsargsp->leaseterm = num;
			nfsargsp->flags |= NFSMNT_LEASETERM;
			break;
		case 'l':
			nfsargsp->flags |= NFSMNT_RDIRPLUS;
			break;
#ifdef NFSKERB
		case 'm':
			(void)strncpy(realm, optarg, REALM_SZ - 1);
			realm[REALM_SZ - 1] = '\0';
			break;
#endif
		case 'N':
			nfsargsp->flags &= ~NFSMNT_RESVPORT;
			break;
		case 'o':
			altflags = 0;
			set_flags(&altflags, &nfsargsp->flags, TRUE);
			if (mountmode == V2)
				altflags |= ALTF_NFSV2;
			else if (mountmode == V3)
				altflags |= ALTF_NFSV3;
			getmntopts(optarg, mopts, &mntflags, &altflags);
			set_flags(&altflags, &nfsargsp->flags, FALSE);
			/*
			 * Handle altflags which don't map directly to
			 * mount flags.
			 */
			if(altflags & ALTF_BG)
				opflags |= BGRND;
			if(altflags & ALTF_MNTUDP)
				mnttcp_ok = 0;
			if(altflags & ALTF_TCP) {
				nfsargsp->sotype = SOCK_STREAM;
				nfsproto = IPPROTO_TCP;
			}
			if(altflags & ALTF_PORT)
				port_no = atoi(strstr(optarg, "port=") + 5);
			mountmode = ANY;
			if(altflags & ALTF_NFSV2)
				mountmode = V2;
			if(altflags & ALTF_NFSV3)
				mountmode = V3;
			if(altflags & ALTF_ACREGMIN)
				nfsargsp->acregmin = atoi(strstr(optarg,
				    "acregmin=") + 9);
			if(altflags & ALTF_ACREGMAX)
				nfsargsp->acregmax = atoi(strstr(optarg,
				    "acregmax=") + 9);
			if(altflags & ALTF_ACDIRMIN)
				nfsargsp->acdirmin = atoi(strstr(optarg,
				    "acdirmin=") + 9);
			if(altflags & ALTF_ACDIRMAX)
				nfsargsp->acdirmax = atoi(strstr(optarg,
				    "acdirmax=") + 9);
			break;
		case 'P':
			/* obsolete for NFSMNT_RESVPORT, now default */
			break;
		case 'q':
			mountmode = V3;
			nfsargsp->flags |= NFSMNT_NQNFS;
			break;
		case 'R':
			num = strtol(optarg, &p, 10);
			if (*p || num <= 0)
				errx(1, "illegal -R value -- %s", optarg);
			retrycnt = num;
			break;
		case 'r':
			num = strtol(optarg, &p, 10);
			if (*p || num <= 0)
				errx(1, "illegal -r value -- %s", optarg);
			nfsargsp->rsize = num;
			nfsargsp->flags |= NFSMNT_RSIZE;
			break;
		case 's':
			nfsargsp->flags |= NFSMNT_SOFT;
			break;
		case 'T':
			nfsargsp->sotype = SOCK_STREAM;
			nfsproto = IPPROTO_TCP;
			break;
		case 't':
			num = strtol(optarg, &p, 10);
			if (*p || num <= 0)
				errx(1, "illegal -t value -- %s", optarg);
			nfsargsp->timeo = num;
			nfsargsp->flags |= NFSMNT_TIMEO;
			break;
		case 'w':
			num = strtol(optarg, &p, 10);
			if (*p || num <= 0)
				errx(1, "illegal -w value -- %s", optarg);
			nfsargsp->wsize = num;
			nfsargsp->flags |= NFSMNT_WSIZE;
			break;
		case 'x':
			num = strtol(optarg, &p, 10);
			if (*p || num <= 0)
				errx(1, "illegal -x value -- %s", optarg);
			nfsargsp->retrans = num;
			nfsargsp->flags |= NFSMNT_RETRANS;
			break;
		case 'U':
			mnttcp_ok = 0;
			break;
		default:
			usage();
			break;
		}
	argc -= optind;
	argv += optind;

	if (argc != 2) {
		usage();
		/* NOTREACHED */
	}

	spec = *argv++;
	name = *argv;

	if (!getnfsargs(spec, nfsargsp))
		exit(1);

	/* resolve the mountpoint with realpath(3) */
	(void)checkpath(name, mntpath);

#ifdef __FreeBSD__
	error = getvfsbyname("nfs", &vfc);
	if (error && vfsisloadable("nfs")) {
		if(vfsload("nfs"))
			err(EX_OSERR, "vfsload(nfs)");
		endvfsent();	/* clear cache */
		error = getvfsbyname("nfs", &vfc);
	}
	if (error)
		errx(EX_OSERR, "nfs filesystem is not available");

	if (mount(vfc.vfc_name, mntpath, mntflags, nfsargsp))
		err(1, "%s", mntpath);
#else
	if (mount("nfs", mntpath, mntflags, nfsargsp))
		err(1, "%s", mntpath);
#endif
	if (nfsargsp->flags & (NFSMNT_NQNFS | NFSMNT_KERB)) {
		if ((opflags & ISBGRND) == 0) {
			if ((i = fork())) {
				if (i == -1)
					err(1, "nqnfs 1");
				exit(0);
			}
			(void) setsid();
			(void) close(STDIN_FILENO);
			(void) close(STDOUT_FILENO);
			(void) close(STDERR_FILENO);
			(void) chdir("/");
		}
		openlog("mount_nfs:", LOG_PID, LOG_DAEMON);
		nfssvc_flag = NFSSVC_MNTD;
		ncd.ncd_dirp = mntpath;
		while (nfssvc(nfssvc_flag, (caddr_t)&ncd) < 0) {
			if (errno != ENEEDAUTH) {
				syslog(LOG_ERR, "nfssvc err %m");
				continue;
			}
			nfssvc_flag =
			    NFSSVC_MNTD | NFSSVC_GOTAUTH | NFSSVC_AUTHINFAIL;
#ifdef NFSKERB
			/*
			 * Set up as ncd_authuid for the kerberos call.
			 * Must set ruid to ncd_authuid and reset the
			 * ticket name iff ncd_authuid is not the same
			 * as last time, so that the right ticket file
			 * is found.
			 * Get the Kerberos credential structure so that
			 * we have the session key and get a ticket for
			 * this uid.
			 * For more info see the IETF Draft "Authentication
			 * in ONC RPC".
			 */
			if (ncd.ncd_authuid != last_ruid) {
				char buf[512];
				(void)sprintf(buf, "%s%d",
					      TKT_ROOT, ncd.ncd_authuid);
				krb_set_tkt_string(buf);
				last_ruid = ncd.ncd_authuid;
			}
			setreuid(ncd.ncd_authuid, 0);
			kret = krb_get_cred(NFS_KERBSRV, inst, realm, &kcr);
			if (kret == RET_NOTKT) {
		            kret = get_ad_tkt(NFS_KERBSRV, inst, realm,
				DEFAULT_TKT_LIFE);
			    if (kret == KSUCCESS)
				kret = krb_get_cred(NFS_KERBSRV, inst, realm,
				    &kcr);
			}
			if (kret == KSUCCESS)
			    kret = krb_mk_req(&ktick.kt, NFS_KERBSRV, inst,
				realm, 0);

			/*
			 * Fill in the AKN_FULLNAME authenticator and verifier.
			 * Along with the Kerberos ticket, we need to build
			 * the timestamp verifier and encrypt it in CBC mode.
			 */
			if (kret == KSUCCESS &&
			    ktick.kt.length <= (RPCAUTH_MAXSIZ-3*NFSX_UNSIGNED)
			    && gettimeofday(&ktv, (struct timezone *)0) == 0) {
			    ncd.ncd_authtype = RPCAUTH_KERB4;
			    ncd.ncd_authstr = (u_char *)&ktick;
			    ncd.ncd_authlen = nfsm_rndup(ktick.kt.length) +
				3 * NFSX_UNSIGNED;
			    ncd.ncd_verfstr = (u_char *)&kverf;
			    ncd.ncd_verflen = sizeof (kverf);
			    memmove(ncd.ncd_key, kcr.session,
				sizeof (kcr.session));
			    kin.t1 = htonl(ktv.tv_sec);
			    kin.t2 = htonl(ktv.tv_usec);
			    kin.w1 = htonl(NFS_KERBTTL);
			    kin.w2 = htonl(NFS_KERBTTL - 1);
			    bzero((caddr_t)kivec, sizeof (kivec));

			    /*
			     * Encrypt kin in CBC mode using the session
			     * key in kcr.
			     */
			    XXX

			    /*
			     * Finally, fill the timestamp verifier into the
			     * authenticator and verifier.
			     */
			    ktick.kind = htonl(RPCAKN_FULLNAME);
			    kverf.kind = htonl(RPCAKN_FULLNAME);
			    NFS_KERBW1(ktick.kt) = kout.w1;
			    ktick.kt.length = htonl(ktick.kt.length);
			    kverf.verf.t1 = kout.t1;
			    kverf.verf.t2 = kout.t2;
			    kverf.verf.w2 = kout.w2;
			    nfssvc_flag = NFSSVC_MNTD | NFSSVC_GOTAUTH;
			}
			setreuid(0, 0);
#endif /* NFSKERB */
		}
	}
	exit(0);
}

/*
 * Return RPC_SUCCESS if server responds.
 */
enum clnt_stat
pingnfsserver(addr, version, sotype)
	struct sockaddr_in *addr;
	int version;
	int sotype;
{
	struct sockaddr_in sin;
	int tport;
	CLIENT *clp;
	int so = RPC_ANYSOCK;
	enum clnt_stat stat;
	struct timeval pertry, try;

	sin = *addr;

	if ((tport = port_no ? port_no :
	     pmap_getport(&sin, RPCPROG_NFS, version, nfsproto)) == 0) {
		return rpc_createerr.cf_stat;
	}

	sin.sin_port = htons(tport);

	pertry.tv_sec = 10;
	pertry.tv_usec = 0;
	if (sotype == SOCK_STREAM)
		clp = clnttcp_create(&sin, RPCPROG_NFS, version,
				     &so, 0, 0);
	else
		clp = clntudp_create(&sin, RPCPROG_NFS, version,
				     pertry, &so);
	if (clp == NULL)
		return rpc_createerr.cf_stat;
	
	try.tv_sec = 10;
	try.tv_usec = 0;
	stat = clnt_call(clp, NFSPROC_NULL,
			 xdr_void, NULL, xdr_void, NULL, try);

	clnt_destroy(clp);

	return stat;
}

int
getnfsargs(spec, nfsargsp)
	char *spec;
	struct nfs_args *nfsargsp;
{
	register CLIENT *clp;
	struct hostent *hp;
	static struct sockaddr_in saddr;
	struct timeval pertry, try;
	enum clnt_stat clnt_stat;
	int so = RPC_ANYSOCK, i, nfsvers, mntvers, orgcnt, speclen;
	char *hostp, *delimp;
#ifdef NFSKERB
	char *cp;
#endif
	u_short tport;
	size_t len;
	static struct nfhret nfhret;
	static char nam[MNAMELEN + 1];

	tport = 0;

	if ((delimp = strchr(spec, ':')) != NULL) {
		hostp = spec;
		spec = delimp + 1;
	} else if ((delimp = strrchr(spec, '@')) != NULL) {
		warnx("path@server syntax is deprecated, use server:path");
		hostp = delimp + 1;
	} else {
		warnx("no <host>:<dirpath> nfs-name");
		return (0);
	}

	*delimp = '\0';

	/*
	 * If there has been a trailing slash at mounttime it seems
	 * that some mountd implementations fail to remove the mount
	 * entries from their mountlist while unmounting.
	 */
	for (speclen = strlen(spec); 
		speclen > 1 && spec[speclen - 1] == '/';
		speclen--)
		spec[speclen - 1] = '\0';
	if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) {
		warnx("%s:%s: %s", hostp, spec, strerror(ENAMETOOLONG));
		return (0);
	}
	/* Make both '@' and ':' notations equal */
	if (*hostp != '\0') {
		len = strlen(hostp);
		memmove(nam, hostp, len);
		nam[len] = ':';
		memmove(nam + len + 1, spec, speclen);
		nam[len + speclen + 1] = '\0';
	}

	/*
	 * Handle an internet host address and reverse resolve it if
	 * doing Kerberos.
	 */
	if (isdigit(*hostp)) {
		if ((saddr.sin_addr.s_addr = inet_addr(hostp)) == -1) {
			warnx("bad net address %s", hostp);
			return (0);
		}
	} else if ((hp = gethostbyname(hostp)) != NULL)
		memmove(&saddr.sin_addr, hp->h_addr, 
		    MIN(hp->h_length, sizeof(saddr.sin_addr)));
	else {
		warnx("can't get net id for host");
		return (0);
        }
#ifdef NFSKERB
	if ((nfsargsp->flags & NFSMNT_KERB)) {
		if ((hp = gethostbyaddr((char *)&saddr.sin_addr.s_addr,
		    sizeof (u_long), AF_INET)) == (struct hostent *)0) {
			warnx("can't reverse resolve net address");
			return (0);
		}
		memmove(&saddr.sin_addr, hp->h_addr, 
		    MIN(hp->h_length, sizeof(saddr.sin_addr)));
		strncpy(inst, hp->h_name, INST_SZ);
		inst[INST_SZ - 1] = '\0';
		if (cp = strchr(inst, '.'))
			*cp = '\0';
	}
#endif /* NFSKERB */

	orgcnt = retrycnt;
tryagain:
	if (mountmode == ANY || mountmode == V3) {
		nfsvers = 3;
		mntvers = 3;
		nfsargsp->flags |= NFSMNT_NFSV3;
	} else {
		nfsvers = 2;
		mntvers = 1;
		nfsargsp->flags &= ~NFSMNT_NFSV3;
	}
	nfhret.stat = EACCES;	/* Mark not yet successful */
	while (retrycnt > 0) {
		saddr.sin_family = AF_INET;
		saddr.sin_port = htons(PMAPPORT);
		if ((tport = port_no ? port_no :
		     pmap_getport(&saddr, RPCPROG_NFS,
		    		  nfsvers, nfsproto)) == 0) {
			if ((opflags & ISBGRND) == 0)
				clnt_pcreateerror("NFS Portmap");
		} else {
			/*
			 * First ping the nfs server to see if it supports
			 * the version of the protocol we want to use.
			 */
			clnt_stat = pingnfsserver(&saddr, nfsvers,
						  nfsargsp->sotype);
			if (clnt_stat == RPC_PROGVERSMISMATCH) {
				if (mountmode == ANY) {
					mountmode = V2;
					goto tryagain;
				} else {
					errx(1, "can't contact NFS server");
				}
			}
			saddr.sin_port = 0;
			pertry.tv_sec = 10;
			pertry.tv_usec = 0;
			if (mnttcp_ok && nfsargsp->sotype == SOCK_STREAM)
			    clp = clnttcp_create(&saddr, RPCPROG_MNT, mntvers,
				&so, 0, 0);
			else
			    clp = clntudp_create(&saddr, RPCPROG_MNT, mntvers,
				pertry, &so);
			if (clp == NULL) {
				if ((opflags & ISBGRND) == 0)
					clnt_pcreateerror("Cannot MNT RPC");
			} else {
				clp->cl_auth = authunix_create_default();
				try.tv_sec = 10;
				try.tv_usec = 0;
				if (nfsargsp->flags & NFSMNT_KERB)
				    nfhret.auth = RPCAUTH_KERB4;
				else
				    nfhret.auth = RPCAUTH_UNIX;
				nfhret.vers = mntvers;
				clnt_stat = clnt_call(clp, RPCMNT_MOUNT,
				    xdr_dir, spec, xdr_fh, &nfhret, try);
				if (clnt_stat != RPC_SUCCESS) {
					if (clnt_stat == RPC_PROGVERSMISMATCH) {
						if (mountmode == ANY) {
							mountmode = V2;
							goto tryagain;
						} else {
							errx(1, "%s",
							     clnt_sperror(clp, "MNT RPC"));
						}
					}
					if ((opflags & ISBGRND) == 0)
						warnx("%s", clnt_sperror(clp,
						    "bad MNT RPC"));
				} else {
					retrycnt = 0;
				}
				auth_destroy(clp->cl_auth);
				clnt_destroy(clp);
				so = RPC_ANYSOCK;
			}
		}
		if (--retrycnt > 0) {
			if (opflags & BGRND) {
				warnx("Cannot immediately mount %s:%s, "
				    "backgrounding", hostp, spec);
				opflags &= ~BGRND;
				if ((i = fork())) {
					if (i == -1)
						err(1, "nqnfs 2");
					exit(0);
				}
				(void) setsid();
				(void) close(STDIN_FILENO);
				(void) close(STDOUT_FILENO);
				(void) close(STDERR_FILENO);
				(void) chdir("/");
				opflags |= ISBGRND;
			}
			sleep(60);
		}
	}
	if (nfhret.stat) {
		if (opflags & ISBGRND)
			exit(1);
		warnx("can't access %s: %s", spec, strerror(nfhret.stat));
		return (0);
	}
	saddr.sin_port = htons(tport);
	{
		nfsargsp->addr = (struct sockaddr *) &saddr;
		nfsargsp->addrlen = sizeof (saddr);
	}
	nfsargsp->fh = nfhret.nfh;
	nfsargsp->fhsize = nfhret.fhsize;
	nfsargsp->hostname = nam;
	/* Add mounted filesystem to PATH_MOUNTTAB */
	if (!add_mtab(hostp, spec))
		warnx("can't update %s for %s:%s", PATH_MOUNTTAB, hostp, spec);
	return (1);
}

/*
 * xdr routines for mount rpc's
 */
int
xdr_dir(xdrsp, dirp)
	XDR *xdrsp;
	char *dirp;
{
	return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
}

int
xdr_fh(xdrsp, np)
	XDR *xdrsp;
	register struct nfhret *np;
{
	register int i;
	long auth, authcnt, authfnd = 0;

	if (!xdr_u_long(xdrsp, &np->stat))
		return (0);
	if (np->stat)
		return (1);
	switch (np->vers) {
	case 1:
		np->fhsize = NFSX_V2FH;
		return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH));
	case 3:
		if (!xdr_long(xdrsp, &np->fhsize))
			return (0);
		if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX)
			return (0);
		if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize))
			return (0);
		if (!xdr_long(xdrsp, &authcnt))
			return (0);
		for (i = 0; i < authcnt; i++) {
			if (!xdr_long(xdrsp, &auth))
				return (0);
			if (auth == np->auth)
				authfnd++;
		}
		/*
		 * Some servers, such as DEC's OSF/1 return a nil authenticator
		 * list to indicate RPCAUTH_UNIX.
		 */
		if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX))
			np->stat = EAUTH;
		return (1);
	};
	return (0);
}

void
usage()
{
	(void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
"usage: mount_nfs [-23KNPTUbcdilqs] [-D deadthresh] [-I readdirsize]",
"                 [-L leaseterm] [-R retrycnt] [-a maxreadahead]",
"                 [-g maxgroups] [-m realm] [-o options] [-r readsize]",
"                 [-t timeout] [-w writesize] [-x retrans] rhost:path node");
	exit(1);
}
OpenPOWER on IntegriCloud