mount_nfs.c revision 52037 
1/*
2 * Copyright (c) 1992, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * 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.
35 */
36
37#ifndef lint
38static const char copyright[] =
39"@(#) Copyright (c) 1992, 1993, 1994\n\
40	The Regents of the University of California.  All rights reserved.\n";
41#endif /* not lint */
42
43#ifndef lint
44#if 0
45static char sccsid[] = "@(#)mount_nfs.c	8.11 (Berkeley) 5/4/95";
46#endif
47static const char rcsid[] =
48  "$FreeBSD: head/sbin/mount_nfs/mount_nfs.c 52037 1999-10-08 19:56:45Z n_hibma $";
49#endif /* not lint */
50
51#include <sys/param.h>
52#include <sys/mount.h>
53#include <sys/stat.h>
54#include <sys/syslog.h>
55
56#include <rpc/rpc.h>
57#include <rpc/pmap_clnt.h>
58#include <rpc/pmap_prot.h>
59
60#ifdef ISO
61#include <netiso/iso.h>
62#endif
63
64#ifdef NFSKERB
65#include <kerberosIV/des.h>
66#include <kerberosIV/krb.h>
67#endif
68
69#include <nfs/rpcv2.h>
70#include <nfs/nfsproto.h>
71#include <nfs/nfs.h>
72#include <nfs/nqnfs.h>
73
74#include <arpa/inet.h>
75
76#include <ctype.h>
77#include <err.h>
78#include <errno.h>
79#include <netdb.h>
80#include <stdio.h>
81#include <stdlib.h>
82#include <strings.h>
83#include <sysexits.h>
84#include <unistd.h>
85
86#include "mntopts.h"
87
88#define	ALTF_BG		0x1
89#define ALTF_NOCONN	0x2
90#define ALTF_DUMBTIMR	0x4
91#define ALTF_INTR	0x8
92#define ALTF_KERB	0x10
93#define ALTF_NFSV3	0x20
94#define ALTF_RDIRPLUS	0x40
95#define	ALTF_MNTUDP	0x80
96#define ALTF_RESVPORT	0x100
97#define ALTF_SEQPACKET	0x200
98#define ALTF_NQNFS	0x400
99#define ALTF_SOFT	0x800
100#define ALTF_TCP	0x1000
101#define ALTF_PORT	0x2000
102#define ALTF_NFSV2	0x4000
103#define ALTF_ACREGMIN	0x8000
104#define ALTF_ACREGMAX	0x10000
105#define ALTF_ACDIRMIN	0x20000
106#define ALTF_ACDIRMAX	0x40000
107
108struct mntopt mopts[] = {
109	MOPT_STDOPTS,
110	MOPT_FORCE,
111	MOPT_UPDATE,
112	MOPT_ASYNC,
113	{ "bg", 0, ALTF_BG, 1 },
114	{ "conn", 1, ALTF_NOCONN, 1 },
115	{ "dumbtimer", 0, ALTF_DUMBTIMR, 1 },
116	{ "intr", 0, ALTF_INTR, 1 },
117#ifdef NFSKERB
118	{ "kerb", 0, ALTF_KERB, 1 },
119#endif
120	{ "nfsv3", 0, ALTF_NFSV3, 1 },
121	{ "rdirplus", 0, ALTF_RDIRPLUS, 1 },
122	{ "mntudp", 0, ALTF_MNTUDP, 1 },
123	{ "resvport", 0, ALTF_RESVPORT, 1 },
124#ifdef ISO
125	{ "seqpacket", 0, ALTF_SEQPACKET, 1 },
126#endif
127	{ "nqnfs", 0, ALTF_NQNFS, 1 },
128	{ "soft", 0, ALTF_SOFT, 1 },
129	{ "tcp", 0, ALTF_TCP, 1 },
130	{ "port=", 0, ALTF_PORT, 1 },
131	{ "nfsv2", 0, ALTF_NFSV2, 1 },
132	{ "acregmin=", 0, ALTF_ACREGMIN, 1 },
133	{ "acregmax=", 0, ALTF_ACREGMAX, 1 },
134	{ "acdirmin=", 0, ALTF_ACDIRMIN, 1 },
135	{ "acdirmax=", 0, ALTF_ACDIRMAX, 1 },
136	{ NULL }
137};
138
139struct nfs_args nfsdefargs = {
140	NFS_ARGSVERSION,
141	(struct sockaddr *)0,
142	sizeof (struct sockaddr_in),
143	SOCK_DGRAM,
144	0,
145	(u_char *)0,
146	0,
147	NFSMNT_RESVPORT,
148	NFS_WSIZE,
149	NFS_RSIZE,
150	NFS_READDIRSIZE,
151	10,
152	NFS_RETRANS,
153	NFS_MAXGRPS,
154	NFS_DEFRAHEAD,
155	NQ_DEFLEASE,
156	NQ_DEADTHRESH,
157	(char *)0,
158	/* args version 4 */
159	NFS_MINATTRTIMO,
160	NFS_MAXATTRTIMO,
161	NFS_MINDIRATTRTIMO,
162	NFS_MAXDIRATTRTIMO,
163};
164
165struct nfhret {
166	u_long		stat;
167	long		vers;
168	long		auth;
169	long		fhsize;
170	u_char		nfh[NFSX_V3FHMAX];
171};
172#define	DEF_RETRY	10000
173#define	BGRND	1
174#define	ISBGRND	2
175int retrycnt = DEF_RETRY;
176int opflags = 0;
177int nfsproto = IPPROTO_UDP;
178int mnttcp_ok = 1;
179u_short port_no = 0;
180enum {
181	ANY,
182	V2,
183	V3
184} mountmode = ANY;
185
186#ifdef NFSKERB
187char inst[INST_SZ];
188char realm[REALM_SZ];
189struct {
190	u_long		kind;
191	KTEXT_ST	kt;
192} ktick;
193struct nfsrpc_nickverf kverf;
194struct nfsrpc_fullblock kin, kout;
195NFSKERBKEY_T kivec;
196CREDENTIALS kcr;
197struct timeval ktv;
198NFSKERBKEYSCHED_T kerb_keysched;
199#endif
200
201int	getnfsargs __P((char *, struct nfs_args *));
202#ifdef ISO
203struct	iso_addr *iso_addr __P((const char *));
204#endif
205void	set_rpc_maxgrouplist __P((int));
206void	usage __P((void)) __dead2;
207int	xdr_dir __P((XDR *, char *));
208int	xdr_fh __P((XDR *, struct nfhret *));
209
210/*
211 * Used to set mount flags with getmntopts.  Call with dir=TRUE to
212 * initialize altflags from the current mount flags.  Call with
213 * dir=FALSE to update mount flags with the new value of altflags after
214 * the call to getmntopts.
215 */
216static void
217setflags(int* altflags, int* nfsflags, int dir)
218{
219#define F2(af, nf)					\
220	if (dir) {					\
221		if (*nfsflags & NFSMNT_##nf)		\
222			*altflags |= ALTF_##af;		\
223		else					\
224			*altflags &= ~ALTF_##af;	\
225	} else {					\
226		if (*altflags & ALTF_##af)		\
227			*nfsflags |= NFSMNT_##nf;	\
228		else					\
229			*nfsflags &= ~NFSMNT_##nf;	\
230	}
231#define F(f)	F2(f,f)
232
233	F(NOCONN);
234	F(DUMBTIMR);
235	F2(INTR, INT);
236#ifdef NFSKERB
237	F(KERB);
238#endif
239	F(RDIRPLUS);
240	F(RESVPORT);
241	F(NQNFS);
242	F(SOFT);
243
244#undef F
245#undef F2
246}
247
248int
249main(argc, argv)
250	int argc;
251	char *argv[];
252{
253	register int c;
254	register struct nfs_args *nfsargsp;
255	struct nfs_args nfsargs;
256	struct nfsd_cargs ncd;
257	int mntflags, altflags, i, nfssvc_flag, num;
258	char *name, *p, *spec;
259	struct vfsconf vfc;
260	int error = 0;
261#ifdef NFSKERB
262	uid_t last_ruid;
263
264	last_ruid = -1;
265	(void)strcpy(realm, KRB_REALM);
266	if (sizeof (struct nfsrpc_nickverf) != RPCX_NICKVERF ||
267	    sizeof (struct nfsrpc_fullblock) != RPCX_FULLBLOCK ||
268	    ((char *)&ktick.kt) - ((char *)&ktick) != NFSX_UNSIGNED ||
269	    ((char *)ktick.kt.dat) - ((char *)&ktick) != 2 * NFSX_UNSIGNED)
270		fprintf(stderr, "Yikes! NFSKERB structs not packed!!\n");
271#endif /* NFSKERB */
272	retrycnt = DEF_RETRY;
273
274	mntflags = 0;
275	altflags = 0;
276	nfsargs = nfsdefargs;
277	nfsargsp = &nfsargs;
278	while ((c = getopt(argc, argv,
279	    "23a:bcdD:g:I:iKL:lm:No:PpqR:r:sTt:w:x:U")) != -1)
280		switch (c) {
281		case '2':
282			mountmode = V2;
283			break;
284		case '3':
285			mountmode = V3;
286			break;
287		case 'a':
288			num = strtol(optarg, &p, 10);
289			if (*p || num < 0)
290				errx(1, "illegal -a value -- %s", optarg);
291			nfsargsp->readahead = num;
292			nfsargsp->flags |= NFSMNT_READAHEAD;
293			break;
294		case 'b':
295			opflags |= BGRND;
296			break;
297		case 'c':
298			nfsargsp->flags |= NFSMNT_NOCONN;
299			break;
300		case 'D':
301			num = strtol(optarg, &p, 10);
302			if (*p || num <= 0)
303				errx(1, "illegal -D value -- %s", optarg);
304			nfsargsp->deadthresh = num;
305			nfsargsp->flags |= NFSMNT_DEADTHRESH;
306			break;
307		case 'd':
308			nfsargsp->flags |= NFSMNT_DUMBTIMR;
309			break;
310		case 'g':
311			num = strtol(optarg, &p, 10);
312			if (*p || num <= 0)
313				errx(1, "illegal -g value -- %s", optarg);
314#ifdef __FreeBSD__
315			set_rpc_maxgrouplist(num);
316#endif
317			nfsargsp->maxgrouplist = num;
318			nfsargsp->flags |= NFSMNT_MAXGRPS;
319			break;
320		case 'I':
321			num = strtol(optarg, &p, 10);
322			if (*p || num <= 0)
323				errx(1, "illegal -I value -- %s", optarg);
324			nfsargsp->readdirsize = num;
325			nfsargsp->flags |= NFSMNT_READDIRSIZE;
326			break;
327		case 'i':
328			nfsargsp->flags |= NFSMNT_INT;
329			break;
330#ifdef NFSKERB
331		case 'K':
332			nfsargsp->flags |= NFSMNT_KERB;
333			break;
334#endif
335		case 'L':
336			num = strtol(optarg, &p, 10);
337			if (*p || num < 2)
338				errx(1, "illegal -L value -- %s", optarg);
339			nfsargsp->leaseterm = num;
340			nfsargsp->flags |= NFSMNT_LEASETERM;
341			break;
342		case 'l':
343			nfsargsp->flags |= NFSMNT_RDIRPLUS;
344			break;
345#ifdef NFSKERB
346		case 'm':
347			(void)strncpy(realm, optarg, REALM_SZ - 1);
348			realm[REALM_SZ - 1] = '\0';
349			break;
350#endif
351		case 'N':
352			nfsargsp->flags &= ~NFSMNT_RESVPORT;
353			break;
354		case 'o':
355			altflags = 0;
356			setflags(&altflags, &nfsargsp->flags, TRUE);
357			if (mountmode == V2)
358				altflags |= ALTF_NFSV2;
359			else if (mountmode == V3)
360				altflags |= ALTF_NFSV3;
361			getmntopts(optarg, mopts, &mntflags, &altflags);
362			setflags(&altflags, &nfsargsp->flags, FALSE);
363			/*
364			 * Handle altflags which don't map directly to
365			 * mount flags.
366			 */
367			if(altflags & ALTF_BG)
368				opflags |= BGRND;
369			if(altflags & ALTF_MNTUDP)
370				mnttcp_ok = 0;
371#ifdef ISO
372			if(altflags & ALTF_SEQPACKET)
373				nfsargsp->sotype = SOCK_SEQPACKET;
374#endif
375			if(altflags & ALTF_TCP) {
376				nfsargsp->sotype = SOCK_STREAM;
377				nfsproto = IPPROTO_TCP;
378			}
379			if(altflags & ALTF_PORT)
380				port_no = atoi(strstr(optarg, "port=") + 5);
381			mountmode = ANY;
382			if(altflags & ALTF_NFSV2)
383				mountmode = V2;
384			if(altflags & ALTF_NFSV3)
385				mountmode = V3;
386			if(altflags & ALTF_ACREGMIN)
387				nfsargsp->acregmin = atoi(strstr(optarg,
388				    "acregmin=") + 9);
389			if(altflags & ALTF_ACREGMAX)
390				nfsargsp->acregmax = atoi(strstr(optarg,
391				    "acregmax=") + 9);
392			if(altflags & ALTF_ACDIRMIN)
393				nfsargsp->acdirmin = atoi(strstr(optarg,
394				    "acdirmin=") + 9);
395			if(altflags & ALTF_ACDIRMAX)
396				nfsargsp->acdirmax = atoi(strstr(optarg,
397				    "acdirmax=") + 9);
398			break;
399		case 'P':
400			/* obsolete for NFSMNT_RESVPORT, now default */
401			break;
402#ifdef ISO
403		case 'p':
404			nfsargsp->sotype = SOCK_SEQPACKET;
405			break;
406#endif
407		case 'q':
408			mountmode = V3;
409			nfsargsp->flags |= NFSMNT_NQNFS;
410			break;
411		case 'R':
412			num = strtol(optarg, &p, 10);
413			if (*p || num <= 0)
414				errx(1, "illegal -R value -- %s", optarg);
415			retrycnt = num;
416			break;
417		case 'r':
418			num = strtol(optarg, &p, 10);
419			if (*p || num <= 0)
420				errx(1, "illegal -r value -- %s", optarg);
421			nfsargsp->rsize = num;
422			nfsargsp->flags |= NFSMNT_RSIZE;
423			break;
424		case 's':
425			nfsargsp->flags |= NFSMNT_SOFT;
426			break;
427		case 'T':
428			nfsargsp->sotype = SOCK_STREAM;
429			nfsproto = IPPROTO_TCP;
430			break;
431		case 't':
432			num = strtol(optarg, &p, 10);
433			if (*p || num <= 0)
434				errx(1, "illegal -t value -- %s", optarg);
435			nfsargsp->timeo = num;
436			nfsargsp->flags |= NFSMNT_TIMEO;
437			break;
438		case 'w':
439			num = strtol(optarg, &p, 10);
440			if (*p || num <= 0)
441				errx(1, "illegal -w value -- %s", optarg);
442			nfsargsp->wsize = num;
443			nfsargsp->flags |= NFSMNT_WSIZE;
444			break;
445		case 'x':
446			num = strtol(optarg, &p, 10);
447			if (*p || num <= 0)
448				errx(1, "illegal -x value -- %s", optarg);
449			nfsargsp->retrans = num;
450			nfsargsp->flags |= NFSMNT_RETRANS;
451			break;
452		case 'U':
453			mnttcp_ok = 0;
454			break;
455		default:
456			usage();
457			break;
458		}
459	argc -= optind;
460	argv += optind;
461
462	if (argc != 2) {
463		usage();
464		/* NOTREACHED */
465	}
466
467	spec = *argv++;
468	name = *argv;
469
470	if (!getnfsargs(spec, nfsargsp))
471		exit(1);
472
473#ifdef __FreeBSD__
474	error = getvfsbyname("nfs", &vfc);
475	if (error && vfsisloadable("nfs")) {
476		if(vfsload("nfs"))
477			err(EX_OSERR, "vfsload(nfs)");
478		endvfsent();	/* clear cache */
479		error = getvfsbyname("nfs", &vfc);
480	}
481	if (error)
482		errx(EX_OSERR, "nfs filesystem is not available");
483
484	if (mount(vfc.vfc_name, name, mntflags, nfsargsp))
485		err(1, "%s", name);
486#else
487	if (mount("nfs", name, mntflags, nfsargsp))
488		err(1, "%s", name);
489#endif
490	if (nfsargsp->flags & (NFSMNT_NQNFS | NFSMNT_KERB)) {
491		if ((opflags & ISBGRND) == 0) {
492			if ((i = fork())) {
493				if (i == -1)
494					err(1, "nqnfs 1");
495				exit(0);
496			}
497			(void) setsid();
498			(void) close(STDIN_FILENO);
499			(void) close(STDOUT_FILENO);
500			(void) close(STDERR_FILENO);
501			(void) chdir("/");
502		}
503		openlog("mount_nfs:", LOG_PID, LOG_DAEMON);
504		nfssvc_flag = NFSSVC_MNTD;
505		ncd.ncd_dirp = name;
506		while (nfssvc(nfssvc_flag, (caddr_t)&ncd) < 0) {
507			if (errno != ENEEDAUTH) {
508				syslog(LOG_ERR, "nfssvc err %m");
509				continue;
510			}
511			nfssvc_flag =
512			    NFSSVC_MNTD | NFSSVC_GOTAUTH | NFSSVC_AUTHINFAIL;
513#ifdef NFSKERB
514			/*
515			 * Set up as ncd_authuid for the kerberos call.
516			 * Must set ruid to ncd_authuid and reset the
517			 * ticket name iff ncd_authuid is not the same
518			 * as last time, so that the right ticket file
519			 * is found.
520			 * Get the Kerberos credential structure so that
521			 * we have the session key and get a ticket for
522			 * this uid.
523			 * For more info see the IETF Draft "Authentication
524			 * in ONC RPC".
525			 */
526			if (ncd.ncd_authuid != last_ruid) {
527				char buf[512];
528				(void)sprintf(buf, "%s%d",
529					      TKT_ROOT, ncd.ncd_authuid);
530				krb_set_tkt_string(buf);
531				last_ruid = ncd.ncd_authuid;
532			}
533			setreuid(ncd.ncd_authuid, 0);
534			kret = krb_get_cred(NFS_KERBSRV, inst, realm, &kcr);
535			if (kret == RET_NOTKT) {
536		            kret = get_ad_tkt(NFS_KERBSRV, inst, realm,
537				DEFAULT_TKT_LIFE);
538			    if (kret == KSUCCESS)
539				kret = krb_get_cred(NFS_KERBSRV, inst, realm,
540				    &kcr);
541			}
542			if (kret == KSUCCESS)
543			    kret = krb_mk_req(&ktick.kt, NFS_KERBSRV, inst,
544				realm, 0);
545
546			/*
547			 * Fill in the AKN_FULLNAME authenticator and verifier.
548			 * Along with the Kerberos ticket, we need to build
549			 * the timestamp verifier and encrypt it in CBC mode.
550			 */
551			if (kret == KSUCCESS &&
552			    ktick.kt.length <= (RPCAUTH_MAXSIZ-3*NFSX_UNSIGNED)
553			    && gettimeofday(&ktv, (struct timezone *)0) == 0) {
554			    ncd.ncd_authtype = RPCAUTH_KERB4;
555			    ncd.ncd_authstr = (u_char *)&ktick;
556			    ncd.ncd_authlen = nfsm_rndup(ktick.kt.length) +
557				3 * NFSX_UNSIGNED;
558			    ncd.ncd_verfstr = (u_char *)&kverf;
559			    ncd.ncd_verflen = sizeof (kverf);
560			    memmove(ncd.ncd_key, kcr.session,
561				sizeof (kcr.session));
562			    kin.t1 = htonl(ktv.tv_sec);
563			    kin.t2 = htonl(ktv.tv_usec);
564			    kin.w1 = htonl(NFS_KERBTTL);
565			    kin.w2 = htonl(NFS_KERBTTL - 1);
566			    bzero((caddr_t)kivec, sizeof (kivec));
567
568			    /*
569			     * Encrypt kin in CBC mode using the session
570			     * key in kcr.
571			     */
572			    XXX
573
574			    /*
575			     * Finally, fill the timestamp verifier into the
576			     * authenticator and verifier.
577			     */
578			    ktick.kind = htonl(RPCAKN_FULLNAME);
579			    kverf.kind = htonl(RPCAKN_FULLNAME);
580			    NFS_KERBW1(ktick.kt) = kout.w1;
581			    ktick.kt.length = htonl(ktick.kt.length);
582			    kverf.verf.t1 = kout.t1;
583			    kverf.verf.t2 = kout.t2;
584			    kverf.verf.w2 = kout.w2;
585			    nfssvc_flag = NFSSVC_MNTD | NFSSVC_GOTAUTH;
586			}
587			setreuid(0, 0);
588#endif /* NFSKERB */
589		}
590	}
591	exit(0);
592}
593
594/*
595 * Return RPC_SUCCESS if server responds.
596 */
597enum clnt_stat
598pingnfsserver(addr, version, sotype)
599	struct sockaddr_in *addr;
600	int version;
601	int sotype;
602{
603	struct sockaddr_in sin;
604	int tport;
605	CLIENT *clp;
606	int so = RPC_ANYSOCK;
607	enum clnt_stat stat;
608	struct timeval pertry, try;
609
610	sin = *addr;
611
612	if ((tport = port_no ? port_no :
613	     pmap_getport(&sin, RPCPROG_NFS, version, nfsproto)) == 0) {
614		return rpc_createerr.cf_stat;
615	}
616
617	sin.sin_port = htons(tport);
618
619	pertry.tv_sec = 10;
620	pertry.tv_usec = 0;
621	if (sotype == SOCK_STREAM)
622		clp = clnttcp_create(&sin, RPCPROG_NFS, version,
623				     &so, 0, 0);
624	else
625		clp = clntudp_create(&sin, RPCPROG_NFS, version,
626				     pertry, &so);
627	if (clp == NULL)
628		return rpc_createerr.cf_stat;
629
630	try.tv_sec = 10;
631	try.tv_usec = 0;
632	stat = clnt_call(clp, NFSPROC_NULL,
633			 xdr_void, NULL, xdr_void, NULL, try);
634
635	clnt_destroy(clp);
636
637	return stat;
638}
639
640int
641getnfsargs(spec, nfsargsp)
642	char *spec;
643	struct nfs_args *nfsargsp;
644{
645	register CLIENT *clp;
646	struct hostent *hp;
647	static struct sockaddr_in saddr;
648#ifdef ISO
649	static struct sockaddr_iso isoaddr;
650	struct iso_addr *isop;
651	int isoflag = 0;
652#endif
653	struct timeval pertry, try;
654	enum clnt_stat clnt_stat;
655	int so = RPC_ANYSOCK, i, nfsvers, mntvers, orgcnt;
656	char *hostp, *delimp;
657#ifdef NFSKERB
658	char *cp;
659#endif
660	u_short tport = 0;
661	static struct nfhret nfhret;
662	static char nam[MNAMELEN + 1];
663
664	strncpy(nam, spec, MNAMELEN);
665	nam[MNAMELEN] = '\0';
666	if ((delimp = strchr(spec, '@')) != NULL) {
667		hostp = delimp + 1;
668	} else if ((delimp = strchr(spec, ':')) != NULL) {
669		hostp = spec;
670		spec = delimp + 1;
671	} else {
672		warnx("no <host>:<dirpath> or <dirpath>@<host> spec");
673		return (0);
674	}
675	*delimp = '\0';
676	/*
677	 * DUMB!! Until the mount protocol works on iso transport, we must
678	 * supply both an iso and an inet address for the host.
679	 */
680#ifdef ISO
681	if (!strncmp(hostp, "iso=", 4)) {
682		u_short isoport;
683
684		hostp += 4;
685		isoflag++;
686		if ((delimp = strchr(hostp, '+')) == NULL) {
687			warnx("no iso+inet address");
688			return (0);
689		}
690		*delimp = '\0';
691		if ((isop = iso_addr(hostp)) == NULL) {
692			warnx("bad ISO address");
693			return (0);
694		}
695		memset(&isoaddr, 0, sizeof (isoaddr));
696		memmove(&isoaddr.siso_addr, isop, sizeof (struct iso_addr));
697		isoaddr.siso_len = sizeof (isoaddr);
698		isoaddr.siso_family = AF_ISO;
699		isoaddr.siso_tlen = 2;
700		isoport = htons(NFS_PORT);
701		memmove(TSEL(&isoaddr), &isoport, isoaddr.siso_tlen);
702		hostp = delimp + 1;
703	}
704#endif /* ISO */
705
706	/*
707	 * Handle an internet host address and reverse resolve it if
708	 * doing Kerberos.
709	 */
710	if (isdigit(*hostp)) {
711		if ((saddr.sin_addr.s_addr = inet_addr(hostp)) == -1) {
712			warnx("bad net address %s", hostp);
713			return (0);
714		}
715	} else if ((hp = gethostbyname(hostp)) != NULL)
716		memmove(&saddr.sin_addr, hp->h_addr,
717		    MIN(hp->h_length, sizeof(saddr.sin_addr)));
718	else {
719		warnx("can't get net id for host");
720		return (0);
721        }
722#ifdef NFSKERB
723	if ((nfsargsp->flags & NFSMNT_KERB)) {
724		if ((hp = gethostbyaddr((char *)&saddr.sin_addr.s_addr,
725		    sizeof (u_long), AF_INET)) == (struct hostent *)0) {
726			warnx("can't reverse resolve net address");
727			return (0);
728		}
729		memmove(&saddr.sin_addr, hp->h_addr,
730		    MIN(hp->h_length, sizeof(saddr.sin_addr)));
731		strncpy(inst, hp->h_name, INST_SZ);
732		inst[INST_SZ - 1] = '\0';
733		if (cp = strchr(inst, '.'))
734			*cp = '\0';
735	}
736#endif /* NFSKERB */
737
738	orgcnt = retrycnt;
739tryagain:
740	if (mountmode == ANY || mountmode == V3) {
741		nfsvers = 3;
742		mntvers = 3;
743		nfsargsp->flags |= NFSMNT_NFSV3;
744	} else {
745		nfsvers = 2;
746		mntvers = 1;
747		nfsargsp->flags &= ~NFSMNT_NFSV3;
748	}
749	nfhret.stat = EACCES;	/* Mark not yet successful */
750	while (retrycnt > 0) {
751		saddr.sin_family = AF_INET;
752		saddr.sin_port = htons(PMAPPORT);
753		if ((tport = port_no ? port_no :
754		     pmap_getport(&saddr, RPCPROG_NFS,
755		    		  nfsvers, nfsproto)) == 0) {
756			if ((opflags & ISBGRND) == 0)
757				clnt_pcreateerror("NFS Portmap");
758		} else {
759			/*
760			 * First ping the nfs server to see if it supports
761			 * the version of the protocol we want to use.
762			 */
763			clnt_stat = pingnfsserver(&saddr, nfsvers,
764						  nfsargsp->sotype);
765			if (clnt_stat == RPC_PROGVERSMISMATCH) {
766				if (mountmode == ANY) {
767					mountmode = V2;
768					goto tryagain;
769				} else {
770					errx(1, "can't contact NFS server");
771				}
772			}
773			saddr.sin_port = 0;
774			pertry.tv_sec = 10;
775			pertry.tv_usec = 0;
776			if (mnttcp_ok && nfsargsp->sotype == SOCK_STREAM)
777			    clp = clnttcp_create(&saddr, RPCPROG_MNT, mntvers,
778				&so, 0, 0);
779			else
780			    clp = clntudp_create(&saddr, RPCPROG_MNT, mntvers,
781				pertry, &so);
782			if (clp == NULL) {
783				if ((opflags & ISBGRND) == 0)
784					clnt_pcreateerror("Cannot MNT RPC");
785			} else {
786				clp->cl_auth = authunix_create_default();
787				try.tv_sec = 10;
788				try.tv_usec = 0;
789				if (nfsargsp->flags & NFSMNT_KERB)
790				    nfhret.auth = RPCAUTH_KERB4;
791				else
792				    nfhret.auth = RPCAUTH_UNIX;
793				nfhret.vers = mntvers;
794				clnt_stat = clnt_call(clp, RPCMNT_MOUNT,
795				    xdr_dir, spec, xdr_fh, &nfhret, try);
796				if (clnt_stat != RPC_SUCCESS) {
797					if (clnt_stat == RPC_PROGVERSMISMATCH) {
798						if (mountmode == ANY) {
799							mountmode = V2;
800							goto tryagain;
801						} else {
802							errx(1, "%s",
803							     clnt_sperror(clp, "MNT RPC"));
804						}
805					}
806					if ((opflags & ISBGRND) == 0)
807						warnx("%s", clnt_sperror(clp,
808						    "bad MNT RPC"));
809				} else {
810					auth_destroy(clp->cl_auth);
811					clnt_destroy(clp);
812					retrycnt = 0;
813				}
814			}
815		}
816		if (--retrycnt > 0) {
817			if (opflags & BGRND) {
818				warnx("Cannot immediately mount %s:%s, backgrounding", hostp, spec);
819				opflags &= ~BGRND;
820				if ((i = fork())) {
821					if (i == -1)
822						err(1, "nqnfs 2");
823					exit(0);
824				}
825				(void) setsid();
826				(void) close(STDIN_FILENO);
827				(void) close(STDOUT_FILENO);
828				(void) close(STDERR_FILENO);
829				(void) chdir("/");
830				opflags |= ISBGRND;
831			}
832			sleep(60);
833		}
834	}
835	if (nfhret.stat) {
836		if (opflags & ISBGRND)
837			exit(1);
838		warnx("can't access %s: %s", spec, strerror(nfhret.stat));
839		return (0);
840	}
841	saddr.sin_port = htons(tport);
842#ifdef ISO
843	if (isoflag) {
844		nfsargsp->addr = (struct sockaddr *) &isoaddr;
845		nfsargsp->addrlen = sizeof (isoaddr);
846	} else
847#endif /* ISO */
848	{
849		nfsargsp->addr = (struct sockaddr *) &saddr;
850		nfsargsp->addrlen = sizeof (saddr);
851	}
852	nfsargsp->fh = nfhret.nfh;
853	nfsargsp->fhsize = nfhret.fhsize;
854	nfsargsp->hostname = nam;
855	return (1);
856}
857
858/*
859 * xdr routines for mount rpc's
860 */
861int
862xdr_dir(xdrsp, dirp)
863	XDR *xdrsp;
864	char *dirp;
865{
866	return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
867}
868
869int
870xdr_fh(xdrsp, np)
871	XDR *xdrsp;
872	register struct nfhret *np;
873{
874	register int i;
875	long auth, authcnt, authfnd = 0;
876
877	if (!xdr_u_long(xdrsp, &np->stat))
878		return (0);
879	if (np->stat)
880		return (1);
881	switch (np->vers) {
882	case 1:
883		np->fhsize = NFSX_V2FH;
884		return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH));
885	case 3:
886		if (!xdr_long(xdrsp, &np->fhsize))
887			return (0);
888		if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX)
889			return (0);
890		if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize))
891			return (0);
892		if (!xdr_long(xdrsp, &authcnt))
893			return (0);
894		for (i = 0; i < authcnt; i++) {
895			if (!xdr_long(xdrsp, &auth))
896				return (0);
897			if (auth == np->auth)
898				authfnd++;
899		}
900		/*
901		 * Some servers, such as DEC's OSF/1 return a nil authenticator
902		 * list to indicate RPCAUTH_UNIX.
903		 */
904		if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX))
905			np->stat = EAUTH;
906		return (1);
907	};
908	return (0);
909}
910
911void
912usage()
913{
914	(void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
915"usage: mount_nfs [-23KNPTUbcdilqs] [-D deadthresh] [-I readdirsize]",
916"                 [-L leaseterm] [-R retrycnt] [-a maxreadahead]",
917"                 [-g maxgroups] [-m realm] [-o options] [-r readsize]",
918"                 [-t timeout] [-w writesize] [-x retrans] rhost:path node");
919	exit(1);
920}
921