Bring in a transport-independent RPC (TI-RPC).
[dragonfly.git] / sbin / mount_nfs / mount_nfs.c
CommitLineData
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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.
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35 *
36 * @(#) Copyright (c) 1992, 1993, 1994 The Regents of the University of California. All rights reserved.
37 * @(#)mount_nfs.c 8.11 (Berkeley) 5/4/95
38 * $FreeBSD: src/sbin/mount_nfs/mount_nfs.c,v 1.36.2.6 2003/05/13 14:45:40 trhodes Exp $
9e754ee2 39 * $DragonFly: src/sbin/mount_nfs/mount_nfs.c,v 1.14 2008/07/14 22:22:40 dillon Exp $
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40 */
41
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42#include <sys/param.h>
43#include <sys/mount.h>
ce0e08e2 44#include <sys/socket.h>
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45#include <sys/stat.h>
46#include <sys/syslog.h>
47
48#include <rpc/rpc.h>
49#include <rpc/pmap_clnt.h>
50#include <rpc/pmap_prot.h>
51
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52#include <vfs/nfs/rpcv2.h>
53#include <vfs/nfs/nfsproto.h>
54#include <vfs/nfs/nfs.h>
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55
56#include <arpa/inet.h>
57
58#include <ctype.h>
59#include <err.h>
60#include <errno.h>
ce0e08e2 61#include <fcntl.h>
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62#include <netdb.h>
63#include <stdio.h>
64#include <stdlib.h>
65#include <strings.h>
66#include <sysexits.h>
67#include <unistd.h>
68
69#include "mntopts.h"
70#include "mounttab.h"
71
72#define ALTF_BG 0x1
73#define ALTF_NOCONN 0x2
74#define ALTF_DUMBTIMR 0x4
75#define ALTF_INTR 0x8
76#define ALTF_KERB 0x10
77#define ALTF_NFSV3 0x20
78#define ALTF_RDIRPLUS 0x40
79#define ALTF_MNTUDP 0x80
80#define ALTF_RESVPORT 0x100
81#define ALTF_SEQPACKET 0x200
e07fef60 82#define ALTF_UNUSED400 0x400
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83#define ALTF_SOFT 0x800
84#define ALTF_TCP 0x1000
85#define ALTF_PORT 0x2000
86#define ALTF_NFSV2 0x4000
87#define ALTF_ACREGMIN 0x8000
88#define ALTF_ACREGMAX 0x10000
89#define ALTF_ACDIRMIN 0x20000
90#define ALTF_ACDIRMAX 0x40000
91
92struct mntopt mopts[] = {
93 MOPT_STDOPTS,
94 MOPT_FORCE,
95 MOPT_UPDATE,
96 MOPT_ASYNC,
97 { "bg", 0, ALTF_BG, 1 },
98 { "conn", 1, ALTF_NOCONN, 1 },
99 { "dumbtimer", 0, ALTF_DUMBTIMR, 1 },
100 { "intr", 0, ALTF_INTR, 1 },
101#ifdef NFSKERB
102 { "kerb", 0, ALTF_KERB, 1 },
103#endif
104 { "nfsv3", 0, ALTF_NFSV3, 1 },
105 { "rdirplus", 0, ALTF_RDIRPLUS, 1 },
106 { "mntudp", 0, ALTF_MNTUDP, 1 },
107 { "resvport", 0, ALTF_RESVPORT, 1 },
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108 { "soft", 0, ALTF_SOFT, 1 },
109 { "tcp", 0, ALTF_TCP, 1 },
110 { "port=", 0, ALTF_PORT, 1 },
111 { "nfsv2", 0, ALTF_NFSV2, 1 },
112 { "acregmin=", 0, ALTF_ACREGMIN, 1 },
113 { "acregmax=", 0, ALTF_ACREGMAX, 1 },
114 { "acdirmin=", 0, ALTF_ACDIRMIN, 1 },
115 { "acdirmax=", 0, ALTF_ACDIRMAX, 1 },
340240ff 116 MOPT_NULL
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117};
118
119struct nfs_args nfsdefargs = {
120 NFS_ARGSVERSION,
121 (struct sockaddr *)0,
122 sizeof (struct sockaddr_in),
123 SOCK_DGRAM,
124 0,
125 (u_char *)0,
126 0,
127 NFSMNT_RESVPORT,
128 NFS_WSIZE,
129 NFS_RSIZE,
130 NFS_READDIRSIZE,
131 10,
132 NFS_RETRANS,
133 NFS_MAXGRPS,
134 NFS_DEFRAHEAD,
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135 0,
136 NFS_DEADTHRESH,
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137 (char *)0,
138 /* args version 4 */
139 NFS_MINATTRTIMO,
140 NFS_MAXATTRTIMO,
141 NFS_MINDIRATTRTIMO,
142 NFS_MAXDIRATTRTIMO,
143};
144
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145/* Table for af,sotype -> netid conversions. */
146struct nc_protos {
147 const char *netid;
148 int af;
149 int sotype;
150} nc_protos[] = {
151 {"udp", AF_INET, SOCK_DGRAM},
152 {"tcp", AF_INET, SOCK_STREAM},
153 {"udp6", AF_INET6, SOCK_DGRAM},
154 {"tcp6", AF_INET6, SOCK_STREAM},
155 {NULL, 0, 0}
156};
157
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158struct nfhret {
159 u_long stat;
160 long vers;
161 long auth;
162 long fhsize;
163 u_char nfh[NFSX_V3FHMAX];
164};
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165#define BGRND 1
166#define ISBGRND 2
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167int retrycnt = -1;
168int opflags = 0;
169int nfsproto = IPPROTO_UDP;
170int mnttcp_ok = 1;
ce0e08e2 171char *portspec = NULL; /* Server nfs port; NULL means look up via rpcbind. */
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172enum mountmode {
173 ANY,
174 V2,
175 V3
176} mountmode = ANY;
177
178#ifdef NFSKERB
179char inst[INST_SZ];
180char realm[REALM_SZ];
181struct {
182 u_long kind;
183 KTEXT_ST kt;
184} ktick;
185struct nfsrpc_nickverf kverf;
186struct nfsrpc_fullblock kin, kout;
187NFSKERBKEY_T kivec;
188CREDENTIALS kcr;
189struct timeval ktv;
190NFSKERBKEYSCHED_T kerb_keysched;
191#endif
192
193/* Return codes for nfs_tryproto. */
194enum tryret {
195 TRYRET_SUCCESS,
196 TRYRET_TIMEOUT, /* No response received. */
197 TRYRET_REMOTEERR, /* Error received from remote server. */
198 TRYRET_LOCALERR /* Local failure. */
199};
200
ce0e08e2 201#if 0
9a76cd75 202void set_rpc_maxgrouplist(int);
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203#endif
204static struct netconfig *getnetconf_cached(const char *);
205static const char *netidbytype(int, int);
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206static int getnfsargs(char *, struct nfs_args *);
207static void usage(void) __dead2;
208static int xdr_dir(XDR *, char *);
209static int xdr_fh(XDR *, struct nfhret *);
210static enum tryret
ce0e08e2 211 nfs_tryproto(struct nfs_args *, struct addrinfo *,
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212 char *, char *, char **);
213static enum tryret
214 returncode(enum clnt_stat, struct rpc_err *);
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215
216/*
217 * Used to set mount flags with getmntopts. Call with dir=TRUE to
218 * initialize altflags from the current mount flags. Call with
219 * dir=FALSE to update mount flags with the new value of altflags after
220 * the call to getmntopts.
221 */
222static void
223set_flags(int* altflags, int* nfsflags, int dir)
224{
225#define F2(af, nf) \
226 if (dir) { \
227 if (*nfsflags & NFSMNT_##nf) \
228 *altflags |= ALTF_##af; \
229 else \
230 *altflags &= ~ALTF_##af; \
231 } else { \
232 if (*altflags & ALTF_##af) \
233 *nfsflags |= NFSMNT_##nf; \
234 else \
235 *nfsflags &= ~NFSMNT_##nf; \
236 }
237#define F(f) F2(f,f)
238
239 F(NOCONN);
240 F(DUMBTIMR);
241 F2(INTR, INT);
242#ifdef NFSKERB
243 F(KERB);
244#endif
245 F(RDIRPLUS);
246 F(RESVPORT);
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247 F(SOFT);
248 F(ACREGMIN);
249 F(ACREGMAX);
250 F(ACDIRMIN);
251 F(ACDIRMAX);
252
253#undef F
254#undef F2
255}
256
257int
b5744197 258main(int argc, char **argv)
984263bc 259{
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260 int c;
261 struct nfs_args *nfsargsp;
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262 struct nfs_args nfsargs;
263 struct nfsd_cargs ncd;
264 int mntflags, altflags, nfssvc_flag, num;
265 char *name, *p, *spec;
266 char mntpath[MAXPATHLEN];
267 struct vfsconf vfc;
268 int error = 0;
269#ifdef NFSKERB
270 uid_t last_ruid;
271
272 last_ruid = -1;
7cee7052 273 strcpy(realm, KRB_REALM);
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274 if (sizeof (struct nfsrpc_nickverf) != RPCX_NICKVERF ||
275 sizeof (struct nfsrpc_fullblock) != RPCX_FULLBLOCK ||
276 ((char *)&ktick.kt) - ((char *)&ktick) != NFSX_UNSIGNED ||
277 ((char *)ktick.kt.dat) - ((char *)&ktick) != 2 * NFSX_UNSIGNED)
278 fprintf(stderr, "Yikes! NFSKERB structs not packed!!\n");
279#endif /* NFSKERB */
280
281 mntflags = 0;
282 altflags = 0;
283 nfsargs = nfsdefargs;
284 nfsargsp = &nfsargs;
285 while ((c = getopt(argc, argv,
e07fef60 286 "23a:bcdD:g:I:iKlm:No:PR:r:sTt:w:x:U")) != -1)
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287 switch (c) {
288 case '2':
289 mountmode = V2;
290 break;
291 case '3':
292 mountmode = V3;
293 break;
294 case 'a':
295 num = strtol(optarg, &p, 10);
296 if (*p || num < 0)
297 errx(1, "illegal -a value -- %s", optarg);
298 nfsargsp->readahead = num;
299 nfsargsp->flags |= NFSMNT_READAHEAD;
300 break;
301 case 'b':
302 opflags |= BGRND;
303 break;
304 case 'c':
305 nfsargsp->flags |= NFSMNT_NOCONN;
306 break;
307 case 'D':
308 num = strtol(optarg, &p, 10);
309 if (*p || num <= 0)
310 errx(1, "illegal -D value -- %s", optarg);
311 nfsargsp->deadthresh = num;
312 nfsargsp->flags |= NFSMNT_DEADTHRESH;
313 break;
314 case 'd':
315 nfsargsp->flags |= NFSMNT_DUMBTIMR;
316 break;
ce0e08e2 317#if 0 /* XXXX */
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318 case 'g':
319 num = strtol(optarg, &p, 10);
320 if (*p || num <= 0)
321 errx(1, "illegal -g value -- %s", optarg);
322 set_rpc_maxgrouplist(num);
323 nfsargsp->maxgrouplist = num;
324 nfsargsp->flags |= NFSMNT_MAXGRPS;
325 break;
ce0e08e2 326#endif
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327 case 'I':
328 num = strtol(optarg, &p, 10);
329 if (*p || num <= 0)
330 errx(1, "illegal -I value -- %s", optarg);
331 nfsargsp->readdirsize = num;
332 nfsargsp->flags |= NFSMNT_READDIRSIZE;
333 break;
334 case 'i':
335 nfsargsp->flags |= NFSMNT_INT;
336 break;
337#ifdef NFSKERB
338 case 'K':
339 nfsargsp->flags |= NFSMNT_KERB;
340 break;
341#endif
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342 case 'l':
343 nfsargsp->flags |= NFSMNT_RDIRPLUS;
344 break;
345#ifdef NFSKERB
346 case 'm':
7cee7052 347 strncpy(realm, optarg, REALM_SZ - 1);
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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 set_flags(&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 set_flags(&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 if(altflags & ALTF_TCP) {
372 nfsargsp->sotype = SOCK_STREAM;
373 nfsproto = IPPROTO_TCP;
374 }
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375 if(altflags & ALTF_PORT) {
376 /*
377 * XXX Converting from a string to an int
378 * and back again is silly, and we should
379 * allow /etc/services names.
380 */
381 asprintf(&portspec, "%d",
382 atoi(strstr(optarg, "port=") + 5));
383 if (portspec == NULL)
384 err(1, "asprintf");
385 }
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386 mountmode = ANY;
387 if(altflags & ALTF_NFSV2)
388 mountmode = V2;
389 if(altflags & ALTF_NFSV3)
390 mountmode = V3;
391 if(altflags & ALTF_ACREGMIN)
392 nfsargsp->acregmin = atoi(strstr(optarg,
393 "acregmin=") + 9);
394 if(altflags & ALTF_ACREGMAX)
395 nfsargsp->acregmax = atoi(strstr(optarg,
396 "acregmax=") + 9);
397 if(altflags & ALTF_ACDIRMIN)
398 nfsargsp->acdirmin = atoi(strstr(optarg,
399 "acdirmin=") + 9);
400 if(altflags & ALTF_ACDIRMAX)
401 nfsargsp->acdirmax = atoi(strstr(optarg,
402 "acdirmax=") + 9);
403 break;
404 case 'P':
405 /* obsolete for NFSMNT_RESVPORT, now default */
406 break;
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407 case 'R':
408 num = strtol(optarg, &p, 10);
409 if (*p || num < 0)
410 errx(1, "illegal -R value -- %s", optarg);
411 retrycnt = num;
412 break;
413 case 'r':
414 num = strtol(optarg, &p, 10);
415 if (*p || num <= 0)
416 errx(1, "illegal -r value -- %s", optarg);
417 nfsargsp->rsize = num;
418 nfsargsp->flags |= NFSMNT_RSIZE;
419 break;
420 case 's':
421 nfsargsp->flags |= NFSMNT_SOFT;
422 break;
423 case 'T':
424 nfsargsp->sotype = SOCK_STREAM;
425 nfsproto = IPPROTO_TCP;
426 break;
427 case 't':
428 num = strtol(optarg, &p, 10);
429 if (*p || num <= 0)
430 errx(1, "illegal -t value -- %s", optarg);
431 nfsargsp->timeo = num;
432 nfsargsp->flags |= NFSMNT_TIMEO;
433 break;
434 case 'w':
435 num = strtol(optarg, &p, 10);
436 if (*p || num <= 0)
437 errx(1, "illegal -w value -- %s", optarg);
438 nfsargsp->wsize = num;
439 nfsargsp->flags |= NFSMNT_WSIZE;
440 break;
441 case 'x':
442 num = strtol(optarg, &p, 10);
443 if (*p || num <= 0)
444 errx(1, "illegal -x value -- %s", optarg);
445 nfsargsp->retrans = num;
446 nfsargsp->flags |= NFSMNT_RETRANS;
447 break;
448 case 'U':
449 mnttcp_ok = 0;
450 break;
451 default:
452 usage();
453 break;
454 }
455 argc -= optind;
456 argv += optind;
457
458 if (argc != 2) {
459 usage();
460 /* NOTREACHED */
461 }
462
463 spec = *argv++;
464 name = *argv;
465
466 if (retrycnt == -1)
467 /* The default is to keep retrying forever. */
468 retrycnt = 0;
469 if (!getnfsargs(spec, nfsargsp))
470 exit(1);
471
472 /* resolve the mountpoint with realpath(3) */
7cee7052 473 checkpath(name, mntpath);
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474
475 error = getvfsbyname("nfs", &vfc);
476 if (error && vfsisloadable("nfs")) {
477 if(vfsload("nfs"))
478 err(EX_OSERR, "vfsload(nfs)");
479 endvfsent(); /* clear cache */
480 error = getvfsbyname("nfs", &vfc);
481 }
482 if (error)
483 errx(EX_OSERR, "nfs filesystem is not available");
484
485 if (mount(vfc.vfc_name, mntpath, mntflags, nfsargsp))
486 err(1, "%s", mntpath);
e07fef60 487 if (nfsargsp->flags & NFSMNT_KERB) {
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488 if ((opflags & ISBGRND) == 0) {
489 if (daemon(0, 0) != 0)
490 err(1, "daemon");
491 }
492 openlog("mount_nfs", LOG_PID, LOG_DAEMON);
493 nfssvc_flag = NFSSVC_MNTD;
494 ncd.ncd_dirp = mntpath;
495 while (nfssvc(nfssvc_flag, (caddr_t)&ncd) < 0) {
496 if (errno != ENEEDAUTH) {
497 syslog(LOG_ERR, "nfssvc err %m");
498 continue;
499 }
500 nfssvc_flag =
501 NFSSVC_MNTD | NFSSVC_GOTAUTH | NFSSVC_AUTHINFAIL;
502#ifdef NFSKERB
503 /*
504 * Set up as ncd_authuid for the kerberos call.
505 * Must set ruid to ncd_authuid and reset the
506 * ticket name iff ncd_authuid is not the same
507 * as last time, so that the right ticket file
508 * is found.
509 * Get the Kerberos credential structure so that
510 * we have the session key and get a ticket for
511 * this uid.
512 * For more info see the IETF Draft "Authentication
513 * in ONC RPC".
514 */
515 if (ncd.ncd_authuid != last_ruid) {
516 char buf[512];
7cee7052 517 sprintf(buf, "%s%d", TKT_ROOT, ncd.ncd_authuid);
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518 krb_set_tkt_string(buf);
519 last_ruid = ncd.ncd_authuid;
520 }
521 setreuid(ncd.ncd_authuid, 0);
522 kret = krb_get_cred(NFS_KERBSRV, inst, realm, &kcr);
523 if (kret == RET_NOTKT) {
524 kret = get_ad_tkt(NFS_KERBSRV, inst, realm,
525 DEFAULT_TKT_LIFE);
526 if (kret == KSUCCESS)
527 kret = krb_get_cred(NFS_KERBSRV, inst, realm,
528 &kcr);
529 }
530 if (kret == KSUCCESS)
531 kret = krb_mk_req(&ktick.kt, NFS_KERBSRV, inst,
532 realm, 0);
533
534 /*
535 * Fill in the AKN_FULLNAME authenticator and verifier.
536 * Along with the Kerberos ticket, we need to build
537 * the timestamp verifier and encrypt it in CBC mode.
538 */
539 if (kret == KSUCCESS &&
540 ktick.kt.length <= (RPCAUTH_MAXSIZ-3*NFSX_UNSIGNED)
541 && gettimeofday(&ktv, (struct timezone *)0) == 0) {
542 ncd.ncd_authtype = RPCAUTH_KERB4;
543 ncd.ncd_authstr = (u_char *)&ktick;
544 ncd.ncd_authlen = nfsm_rndup(ktick.kt.length) +
545 3 * NFSX_UNSIGNED;
546 ncd.ncd_verfstr = (u_char *)&kverf;
547 ncd.ncd_verflen = sizeof (kverf);
548 memmove(ncd.ncd_key, kcr.session,
549 sizeof (kcr.session));
550 kin.t1 = htonl(ktv.tv_sec);
551 kin.t2 = htonl(ktv.tv_usec);
552 kin.w1 = htonl(NFS_KERBTTL);
553 kin.w2 = htonl(NFS_KERBTTL - 1);
554 bzero((caddr_t)kivec, sizeof (kivec));
555
556 /*
557 * Encrypt kin in CBC mode using the session
558 * key in kcr.
559 */
560 XXX
561
562 /*
563 * Finally, fill the timestamp verifier into the
564 * authenticator and verifier.
565 */
566 ktick.kind = htonl(RPCAKN_FULLNAME);
567 kverf.kind = htonl(RPCAKN_FULLNAME);
568 NFS_KERBW1(ktick.kt) = kout.w1;
569 ktick.kt.length = htonl(ktick.kt.length);
570 kverf.verf.t1 = kout.t1;
571 kverf.verf.t2 = kout.t2;
572 kverf.verf.w2 = kout.w2;
573 nfssvc_flag = NFSSVC_MNTD | NFSSVC_GOTAUTH;
574 }
575 setreuid(0, 0);
576#endif /* NFSKERB */
577 }
578 }
579 exit(0);
580}
581
340240ff 582static int
b5744197 583getnfsargs(char *spec, struct nfs_args *nfsargsp)
984263bc 584{
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585 struct addrinfo hints, *ai_nfs, *ai;
586#ifdef NFSKERB
587 char host[NI_MAXHOST], serv[NI_MAXSERV];
588#endif
984263bc 589 enum tryret ret;
ce0e08e2 590 int ecode, speclen, remoteerr;
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591 char *hostp, *delimp, *errstr;
592#ifdef NFSKERB
593 char *cp;
594#endif
595 size_t len;
596 static char nam[MNAMELEN + 1];
597
598 if ((delimp = strrchr(spec, ':')) != NULL) {
599 hostp = spec;
600 spec = delimp + 1;
601 } else if ((delimp = strrchr(spec, '@')) != NULL) {
602 warnx("path@server syntax is deprecated, use server:path");
603 hostp = delimp + 1;
604 } else {
605 warnx("no <host>:<dirpath> nfs-name");
606 return (0);
607 }
608 *delimp = '\0';
609
610 /*
611 * If there has been a trailing slash at mounttime it seems
612 * that some mountd implementations fail to remove the mount
613 * entries from their mountlist while unmounting.
614 */
615 for (speclen = strlen(spec);
616 speclen > 1 && spec[speclen - 1] == '/';
617 speclen--)
618 spec[speclen - 1] = '\0';
619 if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) {
620 warnx("%s:%s: %s", hostp, spec, strerror(ENAMETOOLONG));
621 return (0);
622 }
623 /* Make both '@' and ':' notations equal */
624 if (*hostp != '\0') {
625 len = strlen(hostp);
626 memmove(nam, hostp, len);
627 nam[len] = ':';
628 memmove(nam + len + 1, spec, speclen);
629 nam[len + speclen + 1] = '\0';
630 }
631
632 /*
633 * Handle an internet host address and reverse resolve it if
634 * doing Kerberos.
635 */
ce0e08e2
PA
636 memset(&hints, 0, sizeof hints);
637 hints.ai_flags = AI_NUMERICHOST;
638 hints.ai_socktype = nfsargsp->sotype;
639 if (getaddrinfo(hostp, portspec, &hints, &ai_nfs) == 0) {
984263bc 640#ifdef NFSKERB
ce0e08e2
PA
641 if ((nfsargsp->flags & NFSMNT_KERB)) {
642 hints.ai_flags = 0;
643 if (getnameinfo(ai_nfs->ai_addr, ai_nfs->ai_addrlen,
644 host, sizeof host, serv, sizeof serv, 0) != 0) {
cafd601b 645 warnx("can't reverse resolve net address");
ce0e08e2
PA
646 return (0);
647 }
648 hostp = host;
984263bc 649 }
984263bc 650#endif /* NFSKERB */
ce0e08e2
PA
651 } else {
652 hints.ai_flags = 0;
653 if ((ecode = getaddrinfo(hostp, portspec, &hints, &ai_nfs))
654 != 0) {
655 if (portspec == NULL)
656 errx(1, "%s: %s", hostp, gai_strerror(ecode));
657 else
658 errx(1, "%s:%s: %s", hostp, portspec,
659 gai_strerror(ecode));
660 return (0);
cafd601b 661 }
cafd601b 662 }
ce0e08e2
PA
663#ifdef NFSKERB
664 if (nfsargsp->flags & NFSMNT_KERB) {
665 strncpy(inst, hp->h_name, INST_SZ);
666 inst[INST_SZ - 1] = '\0';
667 if (cp = strchr(inst, '.'))
668 *cp = '\0';
cafd601b 669 }
ce0e08e2 670#endif /* NFSKERB */
984263bc
MD
671
672 ret = TRYRET_LOCALERR;
673 for (;;) {
ce0e08e2
PA
674 /*
675 * Try each entry returned by getaddrinfo(). Note the
676 * occurence of remote errors by setting `remoteerr'.
677 */
984263bc 678 remoteerr = 0;
ce0e08e2
PA
679 for (ai = ai_nfs; ai != NULL; ai = ai->ai_next) {
680 ret = nfs_tryproto(nfsargsp, ai, hostp, spec, &errstr);
681 if (ret == TRYRET_SUCCESS)
682 break;
683 if (ret != TRYRET_LOCALERR)
684 remoteerr = 1;
685 if ((opflags & ISBGRND) == 0)
686 fprintf(stderr, "%s\n", errstr);
687 }
984263bc
MD
688 if (ret == TRYRET_SUCCESS)
689 break;
984263bc
MD
690
691 /* Exit if all errors were local. */
692 if (!remoteerr)
693 exit(1);
694
695 /*
696 * If retrycnt == 0, we are to keep retrying forever.
697 * Otherwise decrement it, and exit if it hits zero.
698 */
699 if (retrycnt != 0 && --retrycnt == 0)
700 exit(1);
701
702 if ((opflags & (BGRND | ISBGRND)) == BGRND) {
703 warnx("Cannot immediately mount %s:%s, backgrounding",
704 hostp, spec);
705 opflags |= ISBGRND;
706 if (daemon(0, 0) != 0)
707 err(1, "daemon");
708 }
ce0e08e2 709 sleep(60);
984263bc 710 }
ce0e08e2 711 freeaddrinfo(ai_nfs);
984263bc
MD
712 nfsargsp->hostname = nam;
713 /* Add mounted filesystem to PATH_MOUNTTAB */
714 if (!add_mtab(hostp, spec))
715 warnx("can't update %s for %s:%s", PATH_MOUNTTAB, hostp, spec);
716 return (1);
717}
718
719/*
720 * Try to set up the NFS arguments according to the address
ce0e08e2 721 * family, protocol (and possibly port) specified in `ai'.
984263bc
MD
722 *
723 * Returns TRYRET_SUCCESS if successful, or:
724 * TRYRET_TIMEOUT The server did not respond.
725 * TRYRET_REMOTEERR The server reported an error.
726 * TRYRET_LOCALERR Local failure.
727 *
728 * In all error cases, *errstr will be set to a statically-allocated string
729 * describing the error.
730 */
340240ff 731static enum tryret
ce0e08e2 732nfs_tryproto(struct nfs_args *nfsargsp, struct addrinfo *ai, char *hostp,
984263bc
MD
733 char *spec, char **errstr)
734{
735 static char errbuf[256];
ce0e08e2
PA
736 struct sockaddr_storage nfs_ss;
737 struct netbuf nfs_nb;
984263bc
MD
738 struct nfhret nfhret;
739 struct timeval try;
740 struct rpc_err rpcerr;
741 CLIENT *clp;
ce0e08e2
PA
742 struct netconfig *nconf, *nconf_mnt;
743 const char *netid, *netid_mnt;
744 int doconnect, nfsvers, mntvers;
340240ff 745 enum clnt_stat status;
984263bc
MD
746 enum mountmode trymntmode;
747
748 trymntmode = mountmode;
749 errbuf[0] = '\0';
750 *errstr = errbuf;
ce0e08e2
PA
751
752 if ((netid = netidbytype(ai->ai_family, nfsargsp->sotype)) == NULL) {
753 snprintf(errbuf, sizeof errbuf,
754 "af %d sotype %d not supported", ai->ai_family,
755 nfsargsp->sotype);
756 return (TRYRET_LOCALERR);
757 }
758 if ((nconf = getnetconf_cached(netid)) == NULL) {
759 snprintf(errbuf, sizeof errbuf, "%s: %s", netid, nc_sperror());
760 return (TRYRET_LOCALERR);
761 }
762 /* The RPCPROG_MNT netid may be different. */
763 if (mnttcp_ok) {
764 netid_mnt = netid;
765 nconf_mnt = nconf;
766 } else {
767 if ((netid_mnt = netidbytype(ai->ai_family, SOCK_DGRAM))
768 == NULL) {
769 snprintf(errbuf, sizeof errbuf,
770 "af %d sotype SOCK_DGRAM not supported",
771 ai->ai_family);
772 return (TRYRET_LOCALERR);
773 }
774 if ((nconf_mnt = getnetconf_cached(netid_mnt)) == NULL) {
775 snprintf(errbuf, sizeof errbuf, "%s: %s", netid_mnt,
776 nc_sperror());
777 return (TRYRET_LOCALERR);
778 }
779 }
984263bc
MD
780
781tryagain:
782 if (trymntmode == V2) {
783 nfsvers = 2;
784 mntvers = 1;
785 } else {
786 nfsvers = 3;
787 mntvers = 3;
788 }
789
ce0e08e2
PA
790 if (portspec != NULL) {
791 /* `ai' contains the complete nfsd sockaddr. */
792 nfs_nb.buf = ai->ai_addr;
793 nfs_nb.len = nfs_nb.maxlen = ai->ai_addrlen;
794 } else {
795 /* Ask the remote rpcbind. */
796 nfs_nb.buf = &nfs_ss;
797 nfs_nb.len = nfs_nb.maxlen = sizeof nfs_ss;
798
799 if (!rpcb_getaddr(RPCPROG_NFS, nfsvers, nconf, &nfs_nb,
800 hostp)) {
801 if (rpc_createerr.cf_stat == RPC_PROGVERSMISMATCH &&
802 trymntmode == ANY) {
803 trymntmode = V2;
804 goto tryagain;
805 }
806 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s",
807 netid, hostp, spec,
808 clnt_spcreateerror("RPCPROG_NFS"));
809 return (returncode(rpc_createerr.cf_stat,
810 &rpc_createerr.cf_error));
811 }
812 }
813
984263bc 814 /* Check that the server (nfsd) responds on the port we have chosen. */
ce0e08e2
PA
815 clp = clnt_tli_create(RPC_ANYFD, nconf, &nfs_nb, RPCPROG_NFS, nfsvers,
816 0, 0);
984263bc 817 if (clp == NULL) {
ce0e08e2 818 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid,
984263bc
MD
819 hostp, spec, clnt_spcreateerror("nfsd: RPCPROG_NFS"));
820 return (returncode(rpc_createerr.cf_stat,
821 &rpc_createerr.cf_error));
822 }
823 if (nfsargsp->sotype == SOCK_DGRAM &&
824 !(nfsargsp->flags & NFSMNT_NOCONN)) {
825 /*
826 * Use connect(), to match what the kernel does. This
827 * catches cases where the server responds from the
828 * wrong source address.
829 */
830 doconnect = 1;
831 if (!clnt_control(clp, CLSET_CONNECT, (char *)&doconnect)) {
832 clnt_destroy(clp);
833 snprintf(errbuf, sizeof errbuf,
ce0e08e2
PA
834 "[%s] %s:%s: CLSET_CONNECT failed", netid, hostp,
835 spec);
984263bc
MD
836 return (TRYRET_LOCALERR);
837 }
838 }
839
840 try.tv_sec = 10;
841 try.tv_usec = 0;
ce0e08e2
PA
842 status = clnt_call(clp, NFSPROC_NULL, (xdrproc_t)xdr_void, NULL,
843 (xdrproc_t)xdr_void, NULL, try);
340240ff
JS
844 if (status != RPC_SUCCESS) {
845 if (status == RPC_PROGVERSMISMATCH && trymntmode == ANY) {
984263bc
MD
846 clnt_destroy(clp);
847 trymntmode = V2;
848 goto tryagain;
849 }
850 clnt_geterr(clp, &rpcerr);
ce0e08e2 851 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid,
984263bc
MD
852 hostp, spec, clnt_sperror(clp, "NFSPROC_NULL"));
853 clnt_destroy(clp);
340240ff 854 return (returncode(status, &rpcerr));
984263bc
MD
855 }
856 clnt_destroy(clp);
857
858 /* Send the RPCMNT_MOUNT RPC to get the root filehandle. */
984263bc
MD
859 try.tv_sec = 10;
860 try.tv_usec = 0;
ce0e08e2 861 clp = clnt_tp_create(hostp, RPCPROG_MNT, mntvers, nconf_mnt);
984263bc 862 if (clp == NULL) {
ce0e08e2 863 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
984263bc
MD
864 hostp, spec, clnt_spcreateerror("RPCMNT: clnt_create"));
865 return (returncode(rpc_createerr.cf_stat,
866 &rpc_createerr.cf_error));
867 }
ce0e08e2 868 clp->cl_auth = authsys_create_default();
984263bc
MD
869 if (nfsargsp->flags & NFSMNT_KERB)
870 nfhret.auth = RPCAUTH_KERB4;
871 else
872 nfhret.auth = RPCAUTH_UNIX;
873 nfhret.vers = mntvers;
ce0e08e2
PA
874 status = clnt_call(clp, RPCMNT_MOUNT, (xdrproc_t)xdr_dir, spec,
875 (xdrproc_t)xdr_fh, &nfhret, try);
984263bc 876 auth_destroy(clp->cl_auth);
340240ff
JS
877 if (status != RPC_SUCCESS) {
878 if (status == RPC_PROGVERSMISMATCH && trymntmode == ANY) {
984263bc
MD
879 clnt_destroy(clp);
880 trymntmode = V2;
881 goto tryagain;
882 }
883 clnt_geterr(clp, &rpcerr);
ce0e08e2 884 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
984263bc
MD
885 hostp, spec, clnt_sperror(clp, "RPCPROG_MNT"));
886 clnt_destroy(clp);
340240ff 887 return (returncode(status, &rpcerr));
984263bc
MD
888 }
889 clnt_destroy(clp);
890
891 if (nfhret.stat != 0) {
ce0e08e2 892 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
984263bc
MD
893 hostp, spec, strerror(nfhret.stat));
894 return (TRYRET_REMOTEERR);
895 }
896
897 /*
898 * Store the filehandle and server address in nfsargsp, making
899 * sure to copy any locally allocated structures.
900 */
ce0e08e2 901 nfsargsp->addrlen = nfs_nb.len;
984263bc
MD
902 nfsargsp->addr = malloc(nfsargsp->addrlen);
903 nfsargsp->fhsize = nfhret.fhsize;
904 nfsargsp->fh = malloc(nfsargsp->fhsize);
905 if (nfsargsp->addr == NULL || nfsargsp->fh == NULL)
906 err(1, "malloc");
ce0e08e2 907 bcopy(nfs_nb.buf, nfsargsp->addr, nfsargsp->addrlen);
984263bc
MD
908 bcopy(nfhret.nfh, nfsargsp->fh, nfsargsp->fhsize);
909
910 if (nfsvers == 3)
911 nfsargsp->flags |= NFSMNT_NFSV3;
912 else
913 nfsargsp->flags &= ~NFSMNT_NFSV3;
914
915 return (TRYRET_SUCCESS);
916}
917
ce0e08e2 918
984263bc
MD
919/*
920 * Catagorise a RPC return status and error into an `enum tryret'
921 * return code.
922 */
340240ff
JS
923static enum tryret
924returncode(enum clnt_stat status, struct rpc_err *rpcerr)
984263bc 925{
340240ff 926 switch (status) {
984263bc
MD
927 case RPC_TIMEDOUT:
928 return (TRYRET_TIMEOUT);
929 case RPC_PMAPFAILURE:
930 case RPC_PROGNOTREGISTERED:
931 case RPC_PROGVERSMISMATCH:
932 /* XXX, these can be local or remote. */
933 case RPC_CANTSEND:
934 case RPC_CANTRECV:
935 return (TRYRET_REMOTEERR);
936 case RPC_SYSTEMERROR:
937 switch (rpcerr->re_errno) {
938 case ETIMEDOUT:
939 return (TRYRET_TIMEOUT);
940 case ENOMEM:
941 break;
942 default:
943 return (TRYRET_REMOTEERR);
944 }
945 /* FALLTHROUGH */
946 default:
947 break;
948 }
949 return (TRYRET_LOCALERR);
950}
951
ce0e08e2
PA
952/*
953 * Look up a netid based on an address family and socket type.
954 * `af' is the address family, and `sotype' is SOCK_DGRAM or SOCK_STREAM.
955 *
956 * XXX there should be a library function for this.
957 */
958static const char *
959netidbytype(int af, int sotype)
960{
961 struct nc_protos *p;
962
963 for (p = nc_protos; p->netid != NULL; p++) {
964 if (af != p->af || sotype != p->sotype)
965 continue;
966 return (p->netid);
967 }
968 return (NULL);
969}
970
971/*
972 * Look up a netconfig entry based on a netid, and cache the result so
973 * that we don't need to remember to call freenetconfigent().
974 *
975 * Otherwise it behaves just like getnetconfigent(), so nc_*error()
976 * work on failure.
977 */
978static struct netconfig *
979getnetconf_cached(const char *netid)
980{
981 static struct nc_entry {
982 struct netconfig *nconf;
983 struct nc_entry *next;
984 } *head;
985 struct nc_entry *p;
986 struct netconfig *nconf;
987
988 for (p = head; p != NULL; p = p->next)
989 if (strcmp(netid, p->nconf->nc_netid) == 0)
990 return (p->nconf);
991
992 if ((nconf = getnetconfigent(netid)) == NULL)
993 return (NULL);
994 if ((p = malloc(sizeof(*p))) == NULL)
995 err(1, "malloc");
996 p->nconf = nconf;
997 p->next = head;
998 head = p;
999
1000 return (p->nconf);
1001}
1002
984263bc
MD
1003/*
1004 * xdr routines for mount rpc's
1005 */
340240ff 1006static int
b5744197 1007xdr_dir(XDR *xdrsp, char *dirp)
984263bc
MD
1008{
1009 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
1010}
1011
340240ff 1012static int
02fe642c 1013xdr_fh(XDR *xdrsp, struct nfhret *np)
984263bc 1014{
02fe642c 1015 int i;
984263bc
MD
1016 long auth, authcnt, authfnd = 0;
1017
1018 if (!xdr_u_long(xdrsp, &np->stat))
1019 return (0);
1020 if (np->stat)
1021 return (1);
1022 switch (np->vers) {
1023 case 1:
1024 np->fhsize = NFSX_V2FH;
1025 return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH));
1026 case 3:
1027 if (!xdr_long(xdrsp, &np->fhsize))
1028 return (0);
1029 if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX)
1030 return (0);
1031 if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize))
1032 return (0);
1033 if (!xdr_long(xdrsp, &authcnt))
1034 return (0);
1035 for (i = 0; i < authcnt; i++) {
1036 if (!xdr_long(xdrsp, &auth))
1037 return (0);
1038 if (auth == np->auth)
1039 authfnd++;
1040 }
1041 /*
1042 * Some servers, such as DEC's OSF/1 return a nil authenticator
1043 * list to indicate RPCAUTH_UNIX.
1044 */
1045 if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX))
1046 np->stat = EAUTH;
1047 return (1);
1048 };
1049 return (0);
1050}
1051
340240ff 1052static void
b5744197 1053usage(void)
984263bc 1054{
7cee7052 1055 fprintf(stderr, "%s\n%s\n%s\n%s\n",
e07fef60
MD
1056"usage: mount_nfs [-23KNPTUbcdils] [-D deadthresh] [-I readdirsize]",
1057" [-R retrycnt] [-a maxreadahead]",
984263bc
MD
1058" [-g maxgroups] [-m realm] [-o options] [-r readsize]",
1059" [-t timeout] [-w writesize] [-x retrans] rhost:path node");
1060 exit(1);
1061}